Task: Program Execution
Input (English): 1, 21, ['Y', 'r', 'Y', '757', '273', '9299', 'P', '7655', 'z', 'H', '5599', '7657', '1599', '2867', '853', '5051', 'A', '3677', 'u', 'p', '3595', '6209', '1109']
Output (English): 5953pu7763A15053587682995175679955Hz5567P9929372757YrY