Task: Program Execution
Input (English): 1, 20, ['s', 'M', 'd', '1467', '6159', '6687', '6461', 'z', '4519', 'v', 'y', '8291', 'e', 'G', 'H', 'v', '9245', '4097', '4123', '3851', '7901', '2241']
Output (English): 3851412340979245vHGe8291yv4519z6461668761591467dMs