#include <stdio.h> int main() { char s1[100], s2[100], res[200]; while (scanf("%s %s", s1, s2) != EOF) { int i = 0, top = 0; while (s1[i] != '\0') res[top++] = s1[i++]; i = 0; while (s2[i] != '\0') res[top++] = s2[i++]; res[top] = '\0...