I wanted to merge every line 2-3 together and keep line 1. Here is the example of my text >chrX:147147161-147148161 ATGATGGTGATGTACAGATGGGTTTTTGG TTATCTAATTCATGTGTTGGTCAGATCAA >chrY:16119725-16120725 CAGCTTTGTTCCGTTGCTGGTGAGGAACT GACTCCCTGGGTGTAGGACCCTCCGAGCC What I want it to look like >chrX:147147161-147148161 ATGATGGTGATGTACAGATGGGTTTTTGGTTATCTAATTCATGTGTTGGTCAGATCAA >chrY:16119725-16120725 CAGCTTTGTTCCGTTGCTGGTGAGGAACTGACTCCCTGGGTGTAGGACCCTCCGAGCC I have tried several ways but none has been working so far. Here is what I have been trying… Read More Merge every last two lines in a 3-line row together