Task: Program Execution
Input (English): 8503 8923 1189 1921 3807 1567 8833 d 5635 6851 d x 1833 6573 x m 8361 9749 2495 Z 1469 t 3001 8171 9353 7545 U W 4359 V 8693 u 7831 607 K B O
Output (English): d, d, x, x, m, Z, t, U, W, V, u, K, B, O, 8503, 8923, 1189, 1921, 3807, 1567, 8833, 5635, 6851, 1833, 6573, 8361, 9749, 2495, 1469, 3001, 8171, 9353, 7545, 4359, 8693, 7831, 607