输入以后没反应，什么都没有输出，求各位大佬帮忙看看为什么不对。

#include <cstdio>
#include <string>
#include <algorithm>
using namespace std;

int main()
{
    int a = 0, b = 0, c = 0;
    string sequence;
    scanf("%d%d%d", &a, &b, &c);
    scanf("%s", &sequence);
    if (a > b) swap(a, b);
    if (b > c) swap(b, c);
    if (sequence == "ABC") printf("%d %d %d", a, b, c);
    else if (sequence == "ACB") printf("%d %d %d", a, c, b);
    else if (sequence == "BAC") printf("%d %d %d", b, a, c);
    else if (sequence == "BCA") printf("%d %d %d", b, c, a);
    else if (sequence == "CAB") printf("%d %d %d", c, a, b);
    else if (sequence == "CBA") printf("%d %d %d", c, b, a);

    return 0;
}