#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

double cal(double a, double b, char c){ //根据运算符运算结果
    switch(c){
        case '+': return a + b;
        case '-': return a - b;
        case '*': return a * b;
        case '/': return a / b;
        case 'b': return b / a;
        case 'j': return b - a;
    }
    return 0;
}

bool check(vector<double>& nums){
    char op[6] = {'+', '-', '*', '/','b','j'};
    sort(nums.begin(), nums.end()); //先按照从小到大排
    do{
          for(int i = 0; i < 6; i++) //遍历三个位置的所有可能运算符
              for(int j = 0; j < 6; j++)
                  for(int k = 0; k < 6; k++){
                      double first = cal(nums[0], nums[1], op[i]); //依次运算
                      double second = cal(first, nums[2], op[j]);
                      if(abs(cal(second, nums[3], op[k]) - 24)<1e-5) return true;
                      else if(cal(cal(nums[0], nums[1], op[i]),cal(nums[2], nums[3], op[j]),op[k])==24)
                          return true;
                  }
      }while(next_permutation(nums.begin(), nums.end())); //依次找到其他排列
    return false;
}

int main(){
    vector<double> nums(4);
    while(cin >> nums[0] >> nums[1] >> nums[2] >> nums[3]){ //输入4个数字
        if(check(nums))
            cout << "true" << endl;
        else
            cout << "false" << endl;
    }
    return 0;
}