FID  IID       PEDSEX       SNPSEX       STATUS            F
 101    1            2            0      PROBLEM          nan
 101    2            2            0      PROBLEM          nan
 101    3            1            0      PROBLEM          nan
 105    1            2            0      PROBLEM          nan
 105    2            2            0      PROBLEM          nan
 105    3            1            0      PROBLEM          nan
 112    1            1            0      PROBLEM          nan
 112    2            2            0      PROBLEM          nan
 112    3            1            0      PROBLEM          nan
 117    1            2            0      PROBLEM          nan
 117    2            2            0      PROBLEM          nan
 117    3            1            0      PROBLEM          nan
  12    1            1            0      PROBLEM          nan
  12    2            2            0      PROBLEM          nan
  12    3            1            0      PROBLEM          nan
  13    1            1            0      PROBLEM          nan
  13    2            2            0      PROBLEM          nan
  13    3            1            0      PROBLEM          nan
1334    1            1            0      PROBLEM          nan
1334   10            1            0      PROBLEM          nan
1334   11            2            0      PROBLEM          nan
1334   12            1            0      PROBLEM          nan
1334   13            2            0      PROBLEM          nan
1334    2            2            0      PROBLEM          nan
1340    1            1            0      PROBLEM          nan
1340   10            2            0      PROBLEM          nan
1340   11            1            0      PROBLEM          nan
1340   12            2            0      PROBLEM          nan
1340    2            2            0      PROBLEM          nan
1340    9            1            0      PROBLEM          nan
1341    1            1            0      PROBLEM          nan
1341   11            1            0      PROBLEM          nan
1341   12            2            0      PROBLEM          nan
1341   13            1            0      PROBLEM          nan
1341   14            2            0      PROBLEM          nan
1341    2            2            0      PROBLEM          nan
1344    1            1            0      PROBLEM          nan
1344   12            1            0      PROBLEM          nan
1344   13            2            0      PROBLEM          nan
1345   12            1            0      PROBLEM          nan