Left reads:
          Input     :  21740947
           Mapped   :  20290340 (93.3% of input)
            of these:   2974421 (14.7%) have multiple alignments (120859 have >20)
Right reads:
          Input     :  21740947
           Mapped   :  18664422 (85.8% of input)
            of these:   2723446 (14.6%) have multiple alignments (109969 have >20)
89.6% overall read mapping rate.

Aligned pairs:  18047375
     of these:   2631301 (14.6%) have multiple alignments
                   82564 ( 0.5%) are discordant alignments
82.6% concordant pair alignment rate.