Task: Program Execution
Input (English): Z, U, M, G, 6947, 9793, q, x, 3457, 6891, 2787, 8357, 2923, 5933, h, c, 9871, 4679, I, 1445, 4185
Output (English): Z, U, M, G, q, x, h, c, I, 6947, 9793, 3457, 6891, 2787, 8357, 2923, 5933, 9871, 4679, 1445, 4185