Task: Program Execution
Input (English): 8601, I, 8021, E, u, j, 2171, f, D, 1949, Q, 1751, t, q, R, 7389, 4031, U, U
Output (English): 8601, 9, 8021, 5, 21, 10, 2171, 6, 4, 1949, 17, 1751, 20, 17, 18, 7389, 4031, 21, 21