#include <stdio.h>

#define IN 1 /* внутри слова */
#define OUT 0 /* вне слова */

int main()
{
    int c, nl, nw, nc, state;
    state = OUT;
    nl = nw = nc = 0;
    
    while ((c = getchar()) != EOF) {
        if (c == ' ' || c == '\n' || c == '\t'){
            state = OUT;
            printf("%c \n",c);
        }    
        else if (state == OUT) {
            state = IN;
            printf("%c",c);
        }    
        else {
            printf("%c",c);
        }
    }

    return 0;
}