p = 13 q = 17 x that is a gap [356, 356] Length: 1 [369, 369] Length: 1 [373, 373] Length: 1 [378, 378] Length: 1 [382, 382] Length: 1 [385, 386] Length: 2 [390, 395] Length: 6 [398, 399] Length: 2 [402, 412] Length: 11