12375104 reads; of these:
  12375104 (100.00%) were unpaired; of these:
    3501738 (28.30%) aligned 0 times
    6268209 (50.65%) aligned exactly 1 time
    2605157 (21.05%) aligned >1 times
71.70% overall alignment rate
12375104 reads; of these:
  12375104 (100.00%) were unpaired; of these:
    3501738 (28.30%) aligned 0 times
    6268207 (50.65%) aligned exactly 1 time
    2605159 (21.05%) aligned >1 times
71.70% overall alignment rate
[bam_sort_core] merging from 6 files...