let input ='mgtgddtfdtffzvznvnrncrrbqqhlhhffzqqzpqqthhrhhfphfphhcppcddnwdnwwtmwttfvvthvvrrbvbmvmssrlslfslflppblllwrlrzlldwdllqblqbqbsscmsmwwffjpppnlnhllbblvbvsbbzvzrzzsmsjsddfpftfvtffgjjfzjfjqfqjfjsscvcccgttgtzgzmgmtmbbwzzjqzzdfzfmzmzfzwzvwvggqcqrrcwrcrzrccqcwwbgbqqwdqqzjzsjjwbjjssmmcfcbcddlhhtltmtlljffvjffhghmggmvvfgfqgfgppnpllmvmfvvzjjzrztztvvstsvvppqdpprjjmtmjtmjjdrdcrdccgsccnsccqsqzszqsqgqwggbhbllvclljrrlrqlljtjcjjlrlhrhjhjnnnpllwtwstttlnlqnlnmnqnpqpbqqbgbzzrhzrhzhrzhrzhzshhqvqgqgbbcqccqmcqccvgccrwrgwrgrdrhhbshbhwbhwbhhvthvttfrrqsstqssqmmpnpwpfpcffcdchhrsshrhggtcttmrrhvvjfvjvvclvllmqmvvhddrdjjhdhvhlvhlltlstltffbbqbwqbbbnsbnbwbssjwsjsfjjsjwwzttqzzsdspprlrblrltrrfrsfffwqwpwddddnqqtbtwwhwpwdwmmcrmrsmmwppjzpjpcpdpjpdpdqppmjjlqqjfqqhgqhhbddtccthhwjhhlfftvtppwzpwzpznpzpqpgqpgpnpdndnbnddqrrjdjwwdmmtnntvnnrhrfhfrfwfvwffmnfnlfldfdjjwgwqqwwsslrrvhhrqqsfqfllrmrqmrrbppwjppmlmggvppdhppspjjzljjrzzrlzrrlldllvlpvpfprfprrhdrdlllpqqfhqqhchzzzwpwjpjjgzzwqqtqdqbdbdgggbrgrzzznwwbvbnbpnbpprnrvvfvsscncrczcbchhjqhjjzrznndwnnvttmtthssgvvbvfvtvptpthhzggnjjhrjdqzjbtfpqdtwtmgnngqdzhdrfzqvcqggmcdbsdrdrmgqhmvfvdgbvrnlbhfsbpjhwgzfndqgcjdbpsffcslfcltsbclspdjhscqrncfrjrbjfzspccshtrdggjbhthrrhgnjvsptfnjvjvhhdjfbtfgpfgszhhbcvzplclrnsrpffpjhbthnfsfflqphhjjdpcfwzhfdpnsftrnfhrdhndlrnfrnvprtvnmgclzlrdjrzdcllvlwdlrcfbsgcbwcnbvjztzfsgcgqlmgcbsgwbbrmrcthfpvmbfvtbhqstccfntmphqpjwpbcdpnffqpszlnqdcqtfhvlvpgdpljvcschdtpvcswfzcbpqdhfjzzdjvgldspcvlnfnwffhjzdnbmjjtnrqlgnggsvdltnrpcfwqvphtsmrfzhflwjjbnpwlzhhmdnpqptgcjnrrgcnhwllqsbsjjvzmqsghlzvhdfbrnfhrqjswrpgcctsqvdwzgpqdssfmtgwvsznlbhsgppwdhhtjmscjfrjdgflwcrlbsfwrnvtnmcwpndhtttgqfvmvmfnwdrrvgmgdqlqvvlphwzgmwcphjvcfsqbbwttntmgvfmlmctggmtlwtmfsmczbgdvbsjstzgflnjplgrlhbbgldlchwmhclzbcwpqzlzbjzbplnvpbzjhmwfmrfnwlnsvpzhrgjdpqvnjtbfjfsvdqcfwdjftsmfqdrqllwlbnbmgtswrhbtbqlchznbgnphgntrtwbtmsjtphhqpbngwmmsdnsdqcctrsrzbrtpwtvhvqbrjldfldllpvspthdhdljfvjzcjsltwflscfqsrvzhgvzhqnnjwdwdtnsvgchzrnbzfscvsmrmqsqjmrjjdhtspbzpqtqqbfbzrddwqzwpqjbpbbbghlwmzhqvqdwwwwvltvvcpgzlwzvmqzfcgnjpjnpgsccvzpnzjwwnnjrcpbvwljfrjqzwsrvdmqwwfpldqcdwlchvggclmwnbhlrlzvsrtrqmzchqfqfhqfjgqsfvclnchdnnvdbqpcddnldggwrpbgrwwtssfndhrhnwtqmgrwpggntlqmfgbzjhwwsclvfmwgzzfrsccdfddntnlldpnwzhnzlssnnfbvjjhnrvclmphgfpvnwjzznbvgqnpljcrjpndgrlbdzsbfrrrfztbqcbphlppwcvhmrrmtrlvfjcddtznlmflrpsclgjpqczwrptfsccmdpzfvwnfsvshcnzrjrmstrslhgtrsmgplvcwptfqrgzgwhvtvrqlrjpcbztgtfwpnzqpmctvpdlgrtzzlsmgnftqvtvcmndspjqbdnmrttwhdrncsntntmrwjrqstdrptnhbqgtlqsdqfmbjtvgstndlvndqqsbqvcghwwjdzpszrsfpdzvnmnbzngczndtwtmprbzjdzbthslttzwwfptbphqwczsrqcbcbqnhbtcpjpbcqpjgjmhmfnggcbvctslpmqrpqzbcfrcgzmzpbpwzsjlrmpfzhgnnbqfrbslrfsthgtmsdfhzgdmjwwsgcdptssmbvffhlmfvwnmbpnzbvpsvnwsvsgrcmhpclwsbvtfqstnpzvgmgfcrmjhbccwcptssjhbfmzsqljjcrnnszvffzfwgcpnqrtjnqdltwnbglwlwpschvqwfdztvcwsqtwmgwccgsqbsvlwdhlnqphwtcmdpvvrqfwmlbptbvghvjntqbcsqjspwnmvdqcfbqzqchhhwqgdcmdhfvtzprscpshpbmzhwsznlpvzrwvmhtqsclzffgnvvrfbzmvqmnrrzjbmhdbspjprrmflgrwhnhcqpczchpnrnfjgdlnlrnzwnvjpmzgpfzspwmfnwcrrdczdhtnscmwqwqbcrdrsndpwbdvpgpbpsfzbmvjlsrdcgnwgrvmjnzlpnwtcrmnfcqgmlnhqbwlrnzlbdrnzfhnqddsfmnhnrrrdjgqprmgvrnhzrlccjthhfzdbltgrbrjpmbhvgrlwngdlfsljhfvwhvpmltdfnzwzcgzdpppnzcnpjttdgpzzqppnfzlmhrngbmcmshtgzbjllwstdbnmmwlrlllgfgshvcsjbpnggzrvvmvdqhjhvhmmpvrdqbrfpdtcdbqrvwhdrtqgftnwwzrcgzwmwjmdgmfswqwlgmvmvhscjmzshtbzmfmbqtbsjppzbczwcqpqhhqdggcntdchjgwsvfnzfqdzvhpnwbjhbqnldzbzmctcdqgjsmbqdzmmtjzvqzdqzsfpmncdmqlnpsrwcznbtzqtbcwwdqjftcdmmwdjdnwvpchffsmqmmwvqfgcnfhbjsttwnwppssmvrrhrbqwsncpfnbfggdqjwbgtvgtwsmlqbwzlghnzhjwphswjtbtptmhlzhvvrwqqcgwnmcqtcjlndwgjrpschhhsmrvvwtrjplwrtswhrjlgjhzgzrjhsbrjhtgnmfdvbjlntcrphsnmdcjzgwtvgldrfpcfgpzlgsfthdmpbnhmlsbnbqzpqvzzmvswbbnbtzvbsznqdgqlbbwzhjrzndltfgswtszsmmrhrcrcrcpgtqfcrmjrtflsbcbbmrsrfgnsrmbrpcvfpmqtmbrbbqtzrjntnvbvwjwqmwmcvmzccmwcnhrfpgghlqczcfszfhqgrdnfpnrrzpzbnjqjtvbglvqlhpstpzzcwrdgfhghqtsgzgsmgnpgvbsvsjtnwbvtqpcfdvhnjjvwjwglplthmghrwpmsgbdbfpvqsmsdvjgchlnlnczlzczqmjsnpgrgqgndwzdtlmmgzjpqvbqmcmhnhpqvpjjsftctwsrfmhrlctrvhczjbfsvqnshmchdsrmlrlqdnfsvhlblwghsdnrtwnpdtqgczmghqcmfzvsgqvrngjvbjsvnpzvpsplhvndvqpjjrtmrqscjrhvdmqcgwjmrgsdmgswgnbpdtgvvbrzrcwtvvwhpmcqwdtsmwwfgdpdrjsbvtbdvbhwftqznpssnsnjnclblslfgz';
let result = -1;
let solved = false;
for(let i=0;i<input.length-4;i++)
{
if(!solved){
let s = input.substring(i,(i+4));
if(areUnique(s))
{
solved=true;
result=(i+4);
}
}
}
console.log(result);
}
function areUnique(str)
{
return (new Set(str).size == str.length)
}
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