#include <iostream>
#include <string.h>
//nr 2 problema 2
using namespace std;

int main()
{
    char s[101],aux[101];
    int i=0,j;
    cin.get(s,101);
    do
        {
            while(s[i]==' ')
            i++;
    j=i;
    while(s[j]!=' ')
        j++;
    if((j-i)%2==0)
    {
        strcpy(aux,s+j);
        s[j]='#';
        strcpy(s+j+1,aux);
    }
    i=j;}  while(i<strlen(s));



cout<<s;
}