1234567 1 2 3 4 ------- ------- 1265437 - - (6 leads) 1463257 - - 1623457 - - 1325467 - 1245367 - - 1452367 - 1524367 - ------- ------- Repeat twice. Courses four leads long except as marked. 1260 rows ending in 1234567 Touch is true