Task: Program Execution
Input (English): 7457 l 1607 133 j m 5811 d x g 8623 z 9349 u 6841 t 5327 9569 8835 3969 z 1523 3899 u 4409 9673 3533 8093 6133
Output (English): d, g, j, l, m, t, u, x, z