sum = 0, k = 1. Stop at k > 11. Increment by 5.
1: sum = 1
sum = 1, k = 6
2: sum = 7
sum = 7, k = 11
3: sum = 18
sum = 18, k = 16
STOP, K > 11.

sum = 0, j = 4. Stop at 1, decrement by 1.
1: sum = 1
sum = 4, j = 3
2: sum = 7
sum = 7, j = 2
3: sum = 9
sum = 9, j = 1
STOP, J=1.

2 3
2 4
3 3
3 4

5 2
5 4
4 2
4 4

start = 40
1: sum = 40, start = 42
2: sum = 82, start = 44
3: sum = 126, start = 46
sum > 100, stop

start = 40
start = 82