Task: Program Execution
Input (English): L e t h 2847 j P s 7205 m 5189 R q 3219 557 I U 3097 2859 9681 821 E Z 7999 9185 3241 5961 C 7711 a 9327 E 2633 7005 k 2003 c 4561 3761
Output (English): 5, 9, 11, 14, 15, 18, 19, 20, 21, 24, 25, 26, 27, 29, 31, 33, 34, 36, 38, 39