Day6a.java

package aoc22;

import java.io.IOException;

public class Day6a {
    private static String example1 = "mjqjpqmgbljsphdztnvjfqwrcgsmlb";
    private static String example2 = "bvwbjplbgvbhsrlpgdmjqwftvncz";
    private static String example3 = "nppdvjthqldpwncqszvftbrmjlhg";
    private static String example4 = "nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg";
    private static String example5 = "zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw";
    private static String real = "llqnqffqsqttfffbcfcbcbdcczccfssvwswrwddzlddpdhdwwlvlffjllnjjwjqwjjttwbwcwfccdmmnddgvvpwvvgsshnshsgglljfjzjpjfpfjpplddjcchdhvhlhvllvflfbllsdllgppwjjprjpjrrdwrdrggjvjppgbgttdppwhhcshsvvgpvggsllstsggdjdmjjrvjjszjsjbbsffjwjnwwzjjjvqvfftbffbpffndfdzfdfvdfdggmpmbbwgbgnnbtnnnhggdmdffrqrlrhrzzrmzzmbzzcdcwwzffsrrnfnvfnnvppwjjndjnndtdppgcppsmppljlpjjmlldlsltlglwgwcwnwvwddzrrllwjjnvjvwvppjssncnfcnfcfcczfccpjphjphjjjsgszzhthghjhrjrbrtrjrhrsrfftfzftfmmwmpmgghbggjrrsdswddtjjvnnrwrzrpzzlglwggrnrgrfftnffwwgllrqqzbqbbtltbbgdgpgphggspggplggmcmscsffzcfzzbggdrgrqgrrnlrnrbnnzsnnzcctvvnvwvnwnhhwpwtptllpflfcfttwtjjhwjhhbwhbbtppwhwvhvghvhphpwwcgwwhbbfvbffzpzlllrzlrrbnnrngrnrpnnsszbbqffpsffhfshfhzzqhhcgcgfggzmmdllthhrhnrrwggdqdsstccqllflmflfddjwjzjffvjjfgjgdgbdgdngnpgpnpffsnsjnnbbjdbjbtbmmbrrlbbqmqpqrprjjrbbvnbbzvvcwwlfwfggmhhdhsdhsdhshhqfhfrhhqlqttffpmmjzjqjggqzzdfzflfsllshhvjvfvbfvbbjljhhzrzqqszqzsqqswswbsbzszgzdgzzhjzhhvffhthvtthltthghzhvvjttczttlssvvgjjmsjstjjrfjjhbjbnjbjddqrddnbdnbnwbnbqbmqqgtgqtttcmmqbqrrgrrsrszssvpsvvjqjttjpjwwmwfwttczttgccwhcwwrzwzbwwqbqmqnmqqnfnmmmzdmzmpmssdpsslbbmgmbmlmnlldlccvzzlrzzqbqfqlflwlvlhhtrtcttgnnqhnqqtjjphjhwjhwhpwwvdvfddmndncnppcffhllfvfdfllhgslvtsqhtlfdflcjfmqbnctnfnwqrlqbzrcbvldrffcptsgslqcszqcfdvtpggvdqblwcgmdjqrpjdhtrmvrfrzznspqlfhnjsppbpjdggcwjwprpnlnntgfgmflctqphdmzfvpzzmbzmvrqdgchzmdvjdzmfsslpqvhpgznmpspjpdmlfwwjbbwqbfthghclldpmnsbcwlzswrsnfzbdzpcnrrpspdpfqhvmtfjlppqtphvzzqrwhzccnrgrtgfbfgtwvlwsmcvzmqmhsvztmmvpjzfwzgfwntbrsfthdgrcmgtdsvzcllmcshrlqldrvrnmdgbwttmhczvscrdvfgdvrhfvlghhsfbmrptbwmpnvtsrjlpjlbmmjzwwzbdtjlqqdczqgpzfjslccrcrblhplndblghchczbjjfzlsvvrqhvgdsncgpjhjlprhfhswwbmrnszqzhhlrbqpphvgtfsgmdpjwgcmqnvfdhrqmbspjpdrtdbqnbmbpgqwgmltqwrjprvsfjsmpldcqqbvmfhgzltzfvhlnfdqrphzzjrbdvnnjspvnlnnsdzvgqsqztndjpmnbqtwnpzmmfhsswwnnwwlbnpgbrhzchbnsrwwpprhntngsjzvssttqwfvjrdddtfpgtqqzcwljzmdjtgzdqjjvbqgdttdgvqvlfdsgcjhsmdmwrwdcqdflpfjbfzsvjrzrhhcnvcjblwcdvtbgfhfgcwrcjsrzcdrfwtvdqrghdtrjgdmhrfcsnwwwdpvjtpzdqfgrlmrqscjbfgdbgvflhvdjmnmslvsbcbgwplgqljmlzpgrfjwmvqfwmwrhnmdjhdwgjrngvccrbzmhcqthvvtdtmfqvfczhqbfgzgrmdtprznfzjtrcwqgztchtdmzmnwbfbnbttbvzsflcpsjshgphfdlvhdrcpsqnhjjggbnsqrfpwsdznzcwjbcswwndzbpdnfcbdrfgrmqzvtjttltbntznmqfsmqlgqvlqnrvgrnggslqhbplmgpzwlfzbvwdvrchsnhrnvgmzjdprvvspltcdzmdnlgtmrwnwpdndpdqjltcnmsggrvbprslqhfgmzqtppdpsjcmmbvfgmbpdnwdcgnssfgjhzhrjljdwhrzznscndgbscdmbbtbrnzbqzvcjgjgljbjlrrvdhjdllsnjzhwlmjslghrqplwjwssbzzpdzdfhhsqctlcddnfnnvbcwpdvzdcsgcqpctsjtdtnzpggpzsrrhfjtthqcqhtvwzltbdvdnbgwlppblwzjsqqbcpcrthhrhdnzhdnflqlvbzmcjfcrbmgdgqptfqfbmlfbblqdfmnwgvbdhmcmtmvtggqstjpwhvzjhbgpblmdrnggvrvphbglqgfcphmrgfmrwcdchtwfllqwsnbqttwdcvrwgzjfztmcffppqtmnwpgcrgwtjbdtjlmnpmvlzndljglzblwdrggqvbbfvqcbcbpqttrmqlcqnqvrfqsnlpmwlcgfwfcqpgmszfccbqtcqfwlwqrjjhrdbjqvdmfzjgncjqgqbthpgjgbfdvltbhpnbjqqwrsczrthfhmlzjjjgsjtsvgmwfsjngzfqdqzfhvwjrswvnqvsvvsjdbwlwdcsszdngmmhnnqsgvsrvpnndghrwgzztqczvhcrzdpqtrmrnfsfrlpdnbbtshfhplzqvdvzdvwhwsbpnbzlvcbgptdszjlcgfdzchjcsvhzdljvgpwstzwnssvhztcptnhslggnrschvfnmhcnjvldthtfpqzdvltfgnmtgvlrljhwqdzqfmfblstvfnpfcdsqslrqbztrbfzmsfjtjwhlzfnhrvpfqfqvtdllrvchmqphgljwcspgpwsdwqfdhsqhsflpbcbjjmjrfjrqrqfqcqzqsqcnqhfgsclfnfzblfdhphrvqdpvcqmllrcdnrlwqbrgqsbfqqllcvmglntjwcsjljgntmmldscndfdjcqpwbqpbmfjsgwfwcqbqbbhhgprlbzmvdfjcsmsqvhfhmgrhnwpslztmwbhdgrfzfcmwjswpbpzwstfbfmgwtprmptzjwtrqthrqwgslnmtlfgnvgpwvsfwthtrgwfbnnnwmdcfrpqqztplscvfnfpfwwdnfnzjccnhswwlcrrdqfhvsrnvcdrwmjswzggscplggbwgndsbntqvtrjbmbzrnbbmdjvwrmmtrmfjjhnvrcjcbqlhlthbvtjjczddblbbttmmzgdqmtdqswjdwbjhsrjbvdtqzqdbhhgbttgmgwfgfpczpqpfsddgslltwsvngwbwfbfcdzlqghwdbfzzldjpwpmpjmslwnwbrjjvwcsjgdzjwrrwnvgvrqlgjhwvrgnczspfplhfbtdpbpfqmhbvmcqdgrrjfslzgsqfpwrrrmjdtgbslddwvddrbmrdsdhhnlwsncrmnglrrpvtbrfvjbdmcpgphcdfwnfcglvmlbslttpmjnspqhnmbcqgmncfjjpdfjqhggnswbgppjhllscrvtmtmmbwbpgddtzblscntrmccdpzdnllqpvfdpfpwwvnnbjlzphvqwffwsjmbtllctrjmllwscmldcdrpfrzrqlpwbjwfgmnshzqzgdjqhcwtsqlsjffvzcpnrzmvtlzlgwvrrjtdbcnddbhjgqqzrvhplrbsrwgscjnfmhbcnpdcjqrltgdzzzzbqtsspbcdssbjrzfqdgvhmgdzsjdsqcfwbgrnhrlzgpjmhctqdccmvqzddmcptsjgtfshprqmslvtmtrprfsngrnnpnrccrvnrvcwzrbbnbghlwvcncgzglnqthchhsnzlfrcggdptvwlrbnfwgjpflgrcfzhhgffwcbhwlsdmvmsvvzvdcrlvlnstgz";

    public Day6a() {
        String input = real;

        for (int i = 0; i < input.length(); i++) {
            String a = input.charAt(i) + "";
            String b = input.charAt(i + 1) + "";
            String c = input.charAt(i + 2) + "";
            String d = input.charAt(i + 3) + "";

            if (a.equals(b) || a.equals(c) || a.equals(d) || b.equals(c) || b.equals(d) || c.equals(d)) {
                continue;
            }

            System.out.println("Found start-of-packet marker " + a + b + c + d + " at location: " + (i + 4));
            break;
        }
    }

    public static void main(String[] args) throws IOException {
        new Day6a();
    }
}