counts = Array.new(8) { Hash.new(0) } DATA.read.lines.each.with_object(counts) do |line, counts| (0..7).each do |i| counts[i][line[i]] += 1 end end p counts.map {|h| h.sort_by(&:last).first.first }.join __END__ eqvmfqnf jvkezmqt zcssqwlw cuacncgg ikmpzpoh dzpzobdl qlsnuhuq fwqnoklz cibgplfq ktsqfcrv vcknjnnx upaiaprz bpqmolbq dflhnpnk heqjflch cmewgodc aaorgxkn plekphpw fcofrbnm bmnrygtb rqsqsqio rnlntwxa cxjqqfyl jxjnxchb kfgutxmi cbciszxd irakoonu pcgfnycg fgeivexo ujxdaehw ejkvrych nhlklbgr etjuhgry mkgkmykm teuhrfto juqfslbn tbwxabzi ngdnwsey amcibkyo xlvxwqpj vdbzuvkh gkagbzep kqxzkeip bxccztho vqrywqlc jbzhecjc ozkulgxo uiwbofuk vfwhdnao tycxucwd jvhuljfs xxhqhruc upnndiiz andxywil lowofbqv iroqzrry nmkkqqjb daijrfna jmcstxlq jdefvuaa nkbmowfi agotazda kufoymrn yijwfjyi hyqvaouj soueuhln oomsbkmh buadtssf rvgpeeza hjiymcmd ebgivdap xzieipbg ttpudwqt hndwuncw wqypfkvf jqxuaipm fzwlgxxq ddshbtya ardlcgyi soznvuyw vyizuolp ckfaxyvs nbsjkibi lsrkrdzp oqoffwxa bdugjlsm rtcsylfd 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