Step 1)     7 to 19..............07...13...0
Step 2)13 to 19...........19....01...0
Step 3)19 to 7..............12...01...7
4)7 to 13..............12...08...0
5)19 to 7..............05...08...7
6)7 to 13..............05...13...2
7)13 to 19...........18...00...2
8)7 to 13..............18...02...0
9)19 to 7..............11...02...7
10)7 to 13..............11...09...0
11)19 to 7..............04...09...7
12)7 to 13..............04...13...3
13)13 to 19............17...00...3
14)7 to 13..............17...03...0
15)19 to 7..............10...03...7
16)7 to 13..............10...10...0