Task: Program Execution
Input (English): O U 6529 1663 2069 S 4129 9573 d 685 Z K V 7567 f c t p q g 3241 2329 t 6249 741 R 8429 G 1803 b O 429 1859 799 2413 N 4473 b U 193
Output (English): 21