Mapping reads at  length 51
# reads processed: 13339513
# reads with at least one reported alignment: 1790 (0.01%)
# reads that failed to align: 13337717 (99.99%)
# reads with alignments sampled due to -M: 6 (0.00%)
Reported 1790 alignments to 1 output stream(s)

Mapping reads at  length 50
# reads processed: 13338351
# reads with at least one reported alignment: 800 (0.01%)
# reads that failed to align: 13337551 (99.99%)
Reported 800 alignments to 1 output stream(s)

Mapping reads at  length 49
# reads processed: 13338387
# reads with at least one reported alignment: 1027 (0.01%)
# reads that failed to align: 13337357 (99.99%)
# reads with alignments sampled due to -M: 3 (0.00%)
Reported 1027 alignments to 1 output stream(s)

Mapping reads at  length 48