1 cat 1.txt 2 11111111111111111111111111111111111 3 kllk 4 nciuwbufcbew``````//.]];s[[..; 5 klklkl 6 7 x,dsncdk,;l,ex 8 xw,eocxmcmck 9 11111111111111111111111111111111111 10 11 perl -p -i.bak -w -e 's/1/k/g' 1.txt 12 13 cat 1.txt 14 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 15 kllk 16 nciuwbufcbew``````//.]];s[[..; 17 klklkl 18 19 x,dsncdk,;l,ex 20 xw,eocxmcmck 21 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 22 23 ls 24 1.txt 1.txt.bak Needleman_Wunsch.pl test.pl
