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  1. #!/usr/bin/perl
  2. while(<>){
  3. s/(\d<\d<\d)<(\d)/$1\n$2/;
  4. }
Success #stdin #stdout 0s 4984KB
stdin
1<5<6<4
2<6<9<8
3<8<5<2
stdout
1<5<6
4
2<6<9
8
3<8<5
2