Task: Program Execution
Input (English): 11, 15, ['Y', 'L', 'I', 'u', 'z', '4077', 'K', '4679', 'l', '9269', '4071', '1789', 'b', '2139', 'b', '111', '6715', 'H', '3981']
Output (English): b2139b17894071