1,2,3,4, 9,10,11,12, 17,18,19,20, 25,26,27,28, 33,34,35,36, 41,42,43,44, 0,0,0,0, 0,0,0,0 5,6,7,8, 13,14,15,16, 21,22,23,24, 29,30,31,32, 37,38,39,40, 45,46,47,48, 0,0,0,0, 0,0,0,0