a   b   i x          y          z
pan pan 1 0.34679014 0.72680286 288.35882920
eks pan 2 0.75867996 0.52215111 263.61576591
wye wye 3 0.20460331 0.33831853 1466.25196927
eks wye 4 0.38139939 0.13418874 1048.76936468
