1234567 4 5 6 ------- ----- 1536427 s - 1632457 - 1253467 - s 1235467 s 1236547 - x ------- ----- Twelve part. No call at x in odd parts. Bob at x in parts 2, 4, 8 and 10. Single at x in parts 6 and 12. 5040 rows ending in 1234567 Touch is true