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CLS_S3_Contig100_st CLS_S3_Contig100  53      10      0.3717
CLS_S3_Contig100_at CLS_S3_Contig100  55      11      0.4321
...
CLS_S3_Contig10031_st CLS_S3_Contig10031 61   12      0.547
CLSS3627.b1_F19.ab1   CLS_S3_Contig10031 62   11      0.5129
CLSS3627.b1_F19.ab1   CLS_S3_Contig10031 64   11      0.5789

my %hash_F2_1 =(); my %hash_F2_2 =(); my %hash_F2_3 = ();my %hash_F2_4
+= ();
while(<INPUT2>){
...
      }
     }