#include <iostream>
using namespace std;

void Trim(char ch[101]);

int main()
{
    char ch[101];
    cin.get(ch, 101);

    Trim(ch);

    for (int i = 0; ch[i]; ++i)
        cout << ch[i];
}

void Trim(char ch[101])
{
    int poz1 = 0;
    while (ch[poz1] == ' ')
        poz1++;

    int poz2 = 0;
    while (ch[poz2])
        poz2++;

    poz2--;
    while (ch[poz2] == ' ')
        poz2--;

    char t[101] = "";
    char v[101] = "";
    ch[101] = v[101];

    int x = poz2 - poz1;
    for (int i = 0; i <= x; ++i)
        t[i] = ch[poz1 + i];

    for (int i = 0; i <= x; ++i)
        ch[i] = t[i];
}