#include <bits/stdc++.h>
int main() {
  int a, b, c;
  scanf("%d%d%d", &a, &b, &c);
  int x = a + b - c, y = b + c - a, z = a + c - b;
  if (x < 0 || y < 0 || z < 0 || x % 2 || y % 2 || z % 2)
    printf("Impossible\n");
  else
    printf("%d %d %d\n", x >> 1, y >> 1, z >> 1);
  return 0;
}
