Table 3.

The most efficient routine.

Destination	1	2	3	4	5	6	7
Routine	M → 1	M → 2	M → 3	M → 1 → 2 → 3	M → 1 → 2 → 3 → 4 → 5	M → 6  M → 7	M → 7 → 8  M → 7 → 8 → 9