diff --git "a/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/go/qwik-zgheib.go" "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/go/qwik-zgheib.go"
new file mode 100644
index 0000000000..1e6a61436e
--- /dev/null
+++ "b/Retos/Reto #29 - EL CAR\303\201CTER INFILTRADO [F\303\241cil]/go/qwik-zgheib.go"	
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"fmt"
+)
+
+/*
+type StringComparator interface {
+	Compare(str1, str2 string) ([]string, error)
+}
+*/
+
+type SimpleStringComparator struct{}
+
+func NewSimpleStringComparator() *SimpleStringComparator {
+	return &SimpleStringComparator{}
+}
+
+func (c *SimpleStringComparator) Compare(str1, str2 string) ([]string, error) {
+	if len(str1) != len(str2) {
+		return nil, fmt.Errorf("strings must be of equal length")
+	}
+
+	var differences []string
+	for i := 0; i < len(str1); i++ {
+		if str1[i] != str2[i] {
+			differences = append(differences, string(str1[i]))
+		}
+	}
+
+	return differences, nil
+}
+
+func FindDifferences(str1, str2 string) ([]string, error) {
+	comparator := NewSimpleStringComparator()
+	return comparator.Compare(str1, str2)
+}
+
+func main() {
+	str1 := "I'm maher majar"
+	str2 := "I'm mahar majer"
+
+	differences, err := FindDifferences(str1, str2)
+	if err != nil {
+		fmt.Println("Error:", err)
+		return
+	}
+
+	fmt.Printf("Differences between \"%s\" and \"%s\": %v\n", str1, str2, differences)
+
+	str3 := "I'm.Maher Majar"
+	str4 := "I'm maher majar"
+
+	differences, err = FindDifferences(str3, str4)
+	if err != nil {
+		fmt.Println("Error:", err)
+		return
+	}
+
+	fmt.Printf("Differences between \"%s\" and \"%s\": %v\n", str3, str4, differences)
+}
+
+/**
+	* if use to test: create file <name>_test.go, with this content and execute with go test -v
+	* otherwise install package testify with: go get github.com/stretchr/testify/assert
+
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFindDifferences(t *testing.T) {
+	tests := []struct {
+		str1       string
+		str2       string
+		expected   []string
+		shouldFail bool
+	}{
+		{"I'm maher majar", "I'm mahar majer", []string{"e", "a"}, false},
+		{"I'm.Maher Majar", "I'm maher majar", []string{".", "M", "M"}, false},
+		{"abc", "abcd", nil, true},
+	}
+
+	for _, test := range tests {
+		result, err := FindDifferences(test.str1, test.str2)
+		if test.shouldFail {
+			assert.Error(t, err)
+		} else {
+			assert.NoError(t, err)
+			assert.Equal(t, test.expected, result)
+		}
+	}
+}
+*/
\ No newline at end of file