a   b   sums       counts
pan pan 0.34679014 1
pan wye 0.50262601 1
eks pan 0.75867996 1
eks wye 0.38139939 1
eks zee 0.61178406 1
wye wye 0.20460331 1
wye pan 0.57328892 1
zee pan 0.52712616 1
zee wye 0.59855401 1
hat wye 0.03144188 1
