a   b   i x          y          nf nr fnr filenum
pan pan 1 0.34679014 0.72680286 5  1  1   1
eks pan 2 0.75867996 0.52215111 5  2  2   1
wye wye 3 0.20460331 0.33831853 5  3  3   1
eks wye 4 0.38139939 0.13418874 5  4  4   1
wye pan 5 0.57328892 0.86362447 5  5  1   2
zee pan 6 0.52712616 0.49322129 5  6  2   2
eks zee 7 0.61178406 0.18788492 5  7  3   2
