a   b   i  x                                        y
pan pan 1  *************........................... *****************************...........
eks pan 2  ******************************.......... ********************....................
wye wye 3  ********................................ *************...........................
eks wye 4  ***************......................... *****...................................
wye pan 5  **********************.................. **********************************......
zee pan 6  *********************................... *******************.....................
eks zee 7  ************************................ *******.................................
zee wye 8  ***********************................. ***************************************.
hat wye 9  *....................................... *****************************...........
pan wye 10 ********************.................... **************************************..
