Task: Program Execution
Input (English): sNNujTXLIFejcvOSIgfmzStRHeOtFeoEuGP, NPlrKetLXLIFejcvOSIgfmzxtwGzITytrrJLQ
Output (English): c, e, f, g, i, j, k, l, m, n, o, p, q, r, s, t, v, w, x, y, z