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  1. #!/bin/bash
  2. sed 's/\(\([0-9]\+,\)\{4\}\)\([0-9]\+\),/\1\3\n/g' <<FINISH
  3.  
  4. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
  5.  
  6. FINISH
Success #stdin #stdout 0.02s 5308KB
stdin
Standard input is empty
stdout
1,2,3,4,5
6,7,8,9,10
11,12,13,14,15