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  • Fantastic code right here! thank you. I don't quite get how to print longer chains of characters. How would I print combinations of 3 or 4 characters? Commented Oct 19, 2016 at 10:10
  • loop over chars again and append to doubles this time, edited Commented Oct 19, 2016 at 10:23
  • I've seen that in the first for loop you can actually write: Commented Oct 19, 2016 at 11:07
  • doubles+=( ${chars[@]/#/$c} ) triplets+=( ${chars[@]/#/$c$c} ) So you don't need new for loops. Last thing is the code prints the output alltogether while I wanted it to be written one combination per line. Any suggestion for this? Commented Oct 19, 2016 at 11:09
  • doubles+=( ${chars[@]/#/$c} ) how does it working, someone explain me.. Commented Oct 19, 2016 at 11:12