a

19, 48, 99, 71, 13, 52, 96, 73, 86, 7

Merging...
[left]: 19
[right]: 48
[Done]: 19, 48
Merging...
[left]: 71
[right]: 13
[Done]: 13, 71
Merging...
[left]: 99
[right]: 13, 71
[Done]: 13, 71, 99
Merging...
[left]: 19, 48
[right]: 13, 71, 99
[Done]: 13, 19, 48, 71, 99
Merging...
[left]: 52
[right]: 96
[Done]: 52, 96
Merging...
[left]: 86
[right]: 7
[Done]: 7, 86
Merging...
[left]: 73
[right]: 7, 86
[Done]: 7, 73, 86
Merging...
[left]: 52, 96
[right]: 7, 73, 86
[Done]: 7, 52, 73, 86, 96
Merging...
[left]: 13, 19, 48, 71, 99
[right]: 7, 52, 73, 86, 96
[Done]: 7, 13, 19, 48, 52, 71, 73, 86, 96, 99

7, 13, 19, 48, 52, 71, 73, 86, 96, 99