a   b   i  x          y
pan pan 1  0.34679014 0.72680286
Xks pan 2  0.75867996 0.52215111
wyX wyX 3  0.20460331 0.33831853
Xks wyX 4  0.38139939 0.13418874
wyX pan 5  0.57328892 0.86362447
zXX pan 6  0.52712616 0.49322129
Xks zXX 7  0.61178406 0.18788492
zXX wyX 8  0.59855401 0.97618139
hat wyX 9  0.03144188 0.74955076
pan wyX 10 0.50262601 0.95261836
