diff --git "a/Retos/Reto #28 - EXPRESI\303\223N MATEM\303\201TICA [Media]/rust/sugus-labs.rs" "b/Retos/Reto #28 - EXPRESI\303\223N MATEM\303\201TICA [Media]/rust/sugus-labs.rs"
new file mode 100644
index 0000000000..76aaa35829
--- /dev/null
+++ "b/Retos/Reto #28 - EXPRESI\303\223N MATEM\303\201TICA [Media]/rust/sugus-labs.rs"	
@@ -0,0 +1,45 @@
+use evalexpr::*;
+use std::any::type_name;
+use std::panic;
+
+fn type_of<T>(_: T) -> &'static str {
+    type_name::<T>()
+}
+
+fn test_math_expr(mut text: String, symbol_vec: Vec<char>) -> bool {
+
+    let mut is_math_expr: bool = false;
+    let mut text_symbol_vec: Vec<char> = vec![];
+
+    let _eval: Result<Value, EvalexprError> = eval(&text);
+    //println!(" - {:?}", _eval);
+
+    let response: Value = match _eval {
+        Ok(res) => res,
+        Err(err) => return false
+    };
+
+    for c in text.replace(" ", "").chars() {
+        //println!("{}", c);
+        if !symbol_vec.contains(&c) 
+            && !c.is_digit(10) {
+            //println!(" - {}", c);
+            is_math_expr = false;
+            return is_math_expr
+        }
+    }    
+
+    return true
+}
+
+fn main() {
+
+    let mut symbol_vec: Vec<char> = vec![' ', '.'];
+    let mut operation_vec: Vec<char> = vec![
+        '+', '-', '*', '/', '%'];
+    symbol_vec.append(&mut operation_vec);
+    let text: String = String::from("1 + 1 / -6.5");
+    let is_math_expr: bool = test_math_expr(text, symbol_vec);
+    println!("{}", is_math_expr)
+
+}
\ No newline at end of file
diff --git "a/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/python/sugus-labs.py" "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/python/sugus-labs.py"
new file mode 100644
index 0000000000..63b12077c9
--- /dev/null
+++ "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/python/sugus-labs.py"	
@@ -0,0 +1,23 @@
+def diff_chars(first_text: str, second_text: str):
+    
+    if not isinstance(first_text, str) or not isinstance(second_text, str):
+        raise ValueError("We need only strings!")
+    
+    if len(first_text) != len(second_text):
+        raise ValueError("The  two text needs to have the same length!")  
+    
+    error_list = []
+    
+    for c1, c2 in zip(first_text, second_text):
+        if c1 != c2:
+            error_list.append((c1, c2))
+        #print(c1, c2)  
+    
+    return error_list
+                                              
+if __name__ == "__main__":
+
+    first_text = "Me llamo.Brais Moure"
+    second_text = "Me llamo brais moure"
+    result_list = diff_chars(first_text, second_text)
+    print(result_list)
\ No newline at end of file
diff --git "a/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/rust/sugus-labs.rs" "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/rust/sugus-labs.rs"
new file mode 100644
index 0000000000..7acb72db64
--- /dev/null
+++ "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/rust/sugus-labs.rs"	
@@ -0,0 +1,26 @@
+fn diff_chars(first_text: String, sec_text: String) -> Vec<(char, char)> {
+    
+    let mut error_vec: Vec<(char, char)> = vec![];
+    let first_text_vec: Vec<char> = first_text.chars().collect();
+    let sec_text_vec: Vec<char> = sec_text.chars().collect();
+
+    let iter = first_text_vec.iter().zip(sec_text_vec.iter());
+
+    for (c1, c2) in iter {
+        //println!("{} {}", c1, c2);
+        if c1 != c2 {
+            error_vec.push((*c1, *c2))
+        }          
+    }
+
+    return error_vec;
+}
+
+fn main() {
+
+    let first_text: String = String::from("Me llamo.Brais Moure");
+    let sec_text: String = String::from("Me llamo brais moure");
+    let result_vec: Vec<(char, char)> = diff_chars(first_text, sec_text);
+    println!("{:?}", result_vec);
+
+}
\ No newline at end of file
diff --git a/Retos/Reto #30 - EL TECLADO T9 [Media]/python/sugus-labs.py b/Retos/Reto #30 - EL TECLADO T9 [Media]/python/sugus-labs.py
new file mode 100644
index 0000000000..b8edfe4fa8
--- /dev/null
+++ b/Retos/Reto #30 - EL TECLADO T9 [Media]/python/sugus-labs.py	
@@ -0,0 +1,56 @@
+from bs4 import BeautifulSoup
+import requests
+import re
+import string
+
+def download_t9_alphabet():
+    url = "https://es.wikipedia.org/wiki/Texto_predictivo"
+    body = requests.get(url)
+    body_text = body.content
+
+    clean = re.compile('<.*?>')
+
+    alphabet_dict = dict()
+
+    soup = BeautifulSoup(body_text, 'lxml')
+    divs = soup.find_all("div", class_="mw-parser-output")
+    for div in divs:
+        uls = div.find_all("ul")
+        for ul in uls:
+            lis = ul.find_all("li")
+            for li in lis:
+                try:
+                    clean_line = re.sub(clean, '', str(li))
+                    number_char = str(clean_line[0])
+                    corr_chars = clean_line.split("(")[1].split(")")[0]
+                    corr_char_list = list(corr_chars)
+                    alphabet_dict[number_char] = corr_char_list
+                    #print(clean_line, number_char, corr_chars) 
+                except:
+                    break     
+            if number_char == "9":
+                break    
+        if number_char == "9":
+            break   
+
+    return alphabet_dict     
+            
+def t9_to_text(text: str, alphabet_dict: dict = download_t9_alphabet):
+    
+    """ text with numbers to words function """
+    
+    new_str_list = []
+    text_list = text.split("-")
+    
+    for t in text_list:
+        pos = len(t) - 1
+        new_char = alphabet_dict.get(t[0])[pos]
+        new_str_list.append(new_char)
+    new_str = "".join(new_str_list)
+    
+    return new_str
+
+if __name__ == "__main__":
+    alphabet_dict = download_t9_alphabet()
+    new_str = t9_to_text("6-666-88-777-33-3-33-888", alphabet_dict)
+    print(new_str)
\ No newline at end of file
diff --git a/Retos/Reto #30 - EL TECLADO T9 [Media]/rust/sugus-labs.rs b/Retos/Reto #30 - EL TECLADO T9 [Media]/rust/sugus-labs.rs
new file mode 100644
index 0000000000..f028245b4a
--- /dev/null
+++ b/Retos/Reto #30 - EL TECLADO T9 [Media]/rust/sugus-labs.rs	
@@ -0,0 +1,44 @@
+use std::collections::HashMap;
+
+fn t9_to_text(text: String, alphabet_hash: &HashMap<char,  Vec<char>>) {
+        
+    let mut new_str_vec: Vec<char> = vec![];
+    let text_parts = text.split("-");
+    let text_vec = text_parts.collect::<Vec<&str>>();
+    let mut pos: usize;
+    let mut new_char: char;
+    let mut ch: char;
+
+    for t in text_vec {
+        pos = t.len() - 1;
+        ch = String::from(t).chars().next().unwrap();
+        new_char = alphabet_hash.get(&ch);
+        dbg!(t, pos, new_char);
+    }
+    //    
+    //    new_char = alphabet_dict.get(t[0])[pos]
+    //    new_str_list.append(new_char)
+    //new_str = "".join(new_str_list)
+    
+   //return new_str
+}
+
+fn main() {
+
+    let text: String = String::from("6-666-88-777-33-3-33-888");
+    let alphabet_hash: HashMap<char,  Vec<char>> = [
+        ('2', vec!['a', 'b', 'c']), 
+        ('3', vec!['d', 'e', 'f']), 
+        ('4', vec!['g', 'h', 'i']), 
+        ('5', vec!['j', 'k', 'l']), 
+        ('6', vec!['m', 'n', 'o']), 
+        ('7', vec!['p', 'q', 'r', 's']), 
+        ('8', vec!['t', 'u', 'v']), 
+        ('9', vec!['w', 'x', 'y', 'z'])]
+        .iter()
+        .cloned()
+        .collect();
+    t9_to_text(text, &alphabet_hash);
+    //println!("{:?}", alphabet_hash);
+
+}
\ No newline at end of file
diff --git "a/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/python/sugus-labs.py" "b/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/python/sugus-labs.py"
new file mode 100644
index 0000000000..11a5df61c1
--- /dev/null
+++ "b/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/python/sugus-labs.py"	
@@ -0,0 +1,22 @@
+def read_abacus_str(abacus_list: list):
+    
+    abacus_number = ""
+    for line in abacus_list:
+        num = str(len(line.split("-")[0]))
+        abacus_number = abacus_number + num
+    abacus_number = int(abacus_number)
+    
+    return abacus_number
+
+if __name__ == "__main__":
+    
+    abacus_list = [
+        "O---OOOOOOOO",
+        "OOO---OOOOOO",
+        "---OOOOOOOOO",
+        "OO---OOOOOOO",
+        "OOOOOOO---OO",
+        "OOOOOOOOO---",
+        "---OOOOOOOOO"]
+    abacus_number = read_abacus_str(abacus_list)
+    print(abacus_number)
\ No newline at end of file
diff --git "a/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/rust/sugus-labs.rs" "b/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/rust/sugus-labs.rs"
new file mode 100644
index 0000000000..36fd99d48d
--- /dev/null
+++ "b/Retos/Reto #31 - EL \303\201BACO [F\303\241cil]/rust/sugus-labs.rs"	
@@ -0,0 +1,33 @@
+fn read_abacus_str(abacus_vec: Vec<String>) -> usize {
+    
+    let mut abacus_num_str = String::new();
+    let mut chunks: Vec<&str> = vec![];
+    let mut num;
+    let abacus_number: usize;
+
+    for line in abacus_vec {
+        chunks = line.split("---").collect();
+        num = chunks[0].len(); 
+        //println!("{:?}", num);
+        abacus_num_str.push_str(&num.to_string());
+    }
+    let abacus_number: usize = abacus_num_str.parse().unwrap();
+    
+    return abacus_number;
+        
+}
+
+fn main() {
+
+    let abacus_vec: Vec<String> = vec![
+        String::from("O---OOOOOOOO"),
+        String::from("OOO---OOOOOO"),
+        String::from("---OOOOOOOOO"),
+        String::from("OO---OOOOOOO"),
+        String::from("OOOOOOO---OO"),
+        String::from("OOOOOOOOO---"),
+        String::from("---OOOOOOOOO")];
+    let abacus_number = read_abacus_str(abacus_vec);
+    println!("{}",abacus_number);
+
+}
\ No newline at end of file