a   b   i x          y          j
pan pan 1 0.34679014 0.72680286 1.72680286
eks pan 2 0.75867996 0.52215111 2.52215111
wye wye 3 0.20460331 0.33831853 3.33831853
eks wye 4 0.38139939 0.13418874 4.13418874
