a   b   i x          y          z
pan pan 1 0.34679014 0.72680286 0.72680286
eks pan 2 0.75867996 0.52215111 0.75867996
wye wye 3 0.20460331 0.33831853 0.33831853
eks wye 4 0.38139939 0.13418874 0.38139939
