#include <iostream>
#include <stack>
#include <queue>
#include <string>
#include <sstream>

using namespace std;

char getMirrorParanthesis(char one) {

    char sign = NULL;

    switch (one) {
        case '{': sign = '}'; break;
        case '(': sign = ')'; break;
        case '[': sign = ']'; break;
        case '}': sign = '{'; break;
        case ')': sign = '('; break;
        case ']': sign = '['; break;
        case ' ': sign = ' '; break;
    }

    return sign;

}

int main() {

    string line;
    getline(cin, line);

    stack<char> left;
    queue<char> right;

    for (int i = 0; i < line.size(); i++) {

        char paranthesis = line[i];

        if (i < line.size() / 2) {
            left.push(paranthesis);
        } else {
            right.push(paranthesis);
        }
    }

    bool balanced = true;

    if (left.size() == right.size()) {
        while (left.size() && right.size()) {
            char leftSign = left.top(); left.pop();
            char rightSign = right.front(); right.pop();
            if (getMirrorParanthesis(leftSign) != rightSign) {
                balanced = false;
                break;
            }
        }
    } else {
        balanced = false;
    }

    cout << (balanced ? "YES" : "NO") << endl;

    return 0;
}