#include<stdio.h> #include<string.h> int main() { int i, j, A[20], B[20]; char S1[20], S2[20]; scanf("%s %s", S1, S2); for (i = 0; i < 20; i++)A[i] = B[i] = 0; int len1 = strlen(S1), len2 = strlen(S2), cnt = 0; for (i = len1 - 1; i >= 0; i--) A[20 -...