#include<stdio.h> #include<math.h> int main() { int x, y, x1, y1; scanf("%d %d\n%d %d", &x, &y, &x1, &y1); if ((abs(x1 - x) + abs(y1 - y)) == 1) { if (x1 - x == 0 && y1 - y == 1) printf("u"); &n...