#include <stdio.h>

void seccionar(char to[], char from[])
{
     int a = 0,b = 0, i = 0;
     int max = 0;

     while(from[i] != ''){
                   if(max <= 80)
                          to[a] = from[i];
                   if(max == 80){
                          if(to[a] == ' ')
                          to[a] = 'n';
                          else {
                               for(;to[a] != ' '; --a)
                                          ++b;
                               to[a] = 'n';
                               max = 0;
                               a = a + b;}
                               b = 0;
                               }
                   ++a;
                   ++i;
                   ++max;}
     to[a] = '';
}
int getline(char s[])
{
    int c, i;

    for(i=0; (c=getchar()) != EOF; ++i){
             s[i] = c;
             if(c == 'n')
             break;}
    ++i;
    s[i] = '';
    return i;
}
int main()
{
    char from[10];
    char to[10];
    while(getline(from) > 1){
                       seccionar(to, from);
                       printf("%s", to);}
    return 0;
}