#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    char *str;
    str = (char*)calloc(100,sizeof(char));
    fgets(str,100,stdin);
    bool fl1 = false,fl2 = false;
    int t1 = 0, t2 = 0;
    for (int i = 0; i < strlen(str); i++) {
        if (!fl1 && str[i] >= '0' && str[i] <= '9') {
            fl1 = true; t1 = i;
        }
        if (str[i] == '.' && fl1) {
            t2 = i;
        }
        if (fl1) {
            t2 = i;
        }
        if (str[i] <= '0' && str[i] >= '9' && str[i] != '.') {
            fl1 = false, fl2 = false;
        }
    }
    for (int i = t1; i <= t2; i++) printf("%c",str[i]);
    return 0;
}