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use strict; use warnings; ... printf qq{>crispr_%d\n%s\n}, ++ $ct, $_ for @kmersGG > 1000 ? @kmersGG[ 0 .. 999 ] : @kmersGG;
>crispr_1 CATTTTCTCTCCCATATTATAGG ... ACGACAGAGAGAGAGAGCAGCGG >crispr_8 AAATCGACAATGCACGACAGAGG