a   b   i     x          y
pan pan 10000 0.34679014 0.72680286
eks pan 20000 0.75867996 0.52215111
wye wye 30000 0.20460331 0.33831853
eks wye 40000 0.38139939 0.13418874
wye pan 50000 0.57328892 0.86362447
zee pan 60000 0.52712616 0.49322129
eks zee 70000 0.61178406 0.18788492
zee wye 80000 0.59855401 0.97618139
hat wye 90000 0.03144188 0.74955076
pan wye 10000 0.50262601 0.95261836
