/*
   Nume program   : giga-chad.c
   Nume concurent : Apostol Mihnea Petru si Stefan Vilcescu
   E-mail         : [email protected] si [email protected]
*/
#include <stdio.h>
#include <stdlib.h>

char v[30];

int main()
{
    int i,j,n,mut,cat;
    char c;
    c=fgetc(stdin);
    mut=0;
    i=0;
    n=0;
    while(c!='\n'){
        v[i]=c;
        c=fgetc(stdin);
        if(c=='-')
            mut++;
        n++;
        i++;
    }
    i=0;
    cat=0;
    while(v[i]!='X'){
        i++;
        if(v[i]=='O')
            cat++;
    }
    j=i;
    while(v[i]!='O' && i>0)
        i--;
    if(v[i]=='O')
    {

        if(i+1<j)
        {
            v[j]='-';
            v[i+1]='X';
        }
        else
        {

            if(mut%2==0)
            {
                i=0;
                while(v[i]!='O')
                {
                    i++;
                }
                v[i-1]='O';
                v[i]='-';
            }
            else
            {
                i=0;
                while(v[i]!='O')
                    i++;

                v[i-2]='O';
                v[i]='-';
            }
        }
    }
    else
    {
        v[j]='-';
    }
    for(i=0;i<n;i++)
        fputc(v[i], stdout);
    fprintf(stdout, "\n");

}