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

char *getline(void){
    int i = 0, s = 1, f = 0, j;
    char *m, c;
    m = (char *) malloc (sizeof(char));
    while ((scanf("%c", &m[i]) != EOF)){
        i++;
        if (s == i) {
            m = (char *) realloc (m, 2 * s * sizeof(char));
            s *= 2;
        }
        if(m[i-1] == '\n') break;
        f = 1;
    }
    if (!f) return NULL;
    if( !isspace(m[i]) ) m[i+1] = '\0';
    for( j = i; j > 0; j--){
        if( isspace(m[j]) && !isspace(m[j-1])){
            m[i] = '\0';
            break;
        }
    }

    return m;
}

int main(void)
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int i = 0, s = 1, j;
    char **n;
    n = (char **) malloc ( sizeof(char *));
    while((n[i]=getline())){
        i++;
        if (s == i) {
            n = (char **) realloc (n, 2 * s * sizeof(char *));
        }
    }
    for( j =i - 1; j >=0 ; j--){
        printf("%s", n[j]);
    }
    return 0;
}