>test1 ATCGTACGATCG
jellyfish count -m 21 -s 100M -t 10 -C reads.fasta jellyfish query mer_counts.jf ATCG jellyfish dump mer_counts.jf > mer_counts_dumps.fa
>2 ACGA >3 ATCG >2 CGTA >1 GATC >1 GTAC