#include <iostream>
#include <string>

using namespace std;

bool isDigit(char c);

int isRight(string s);

int main()
{
    string IP;
    cin >> IP;
    cout << isRight(IP);
    return 0;
}

bool isDigit(char c)
{
    return '0' <= c && c <= '9';
}
int isRight(string s)
{
    int len = s.size(), sum = 0;
    for (int i = 1; i < len - 1; i++);
    {
        if (s[i] == '.')
        {
            if (!(isDigit(s[i + 1]) && isDigit(s[i - 1]))) return 0;
            sum++;
        }
    }
    if (sum != 3) return 0;
    else return 1;
}