Cuvinte2

#include <bits/stdc++.h>
using namespace std;
char s[256],*p,cuvant[11],sep[]=" ,.";
unsigned int palindrom (char s[])
{
    unsigned int i;
    for (i=0;i<=strlen(s)/2-1;i++)
        if(s[i]!=s[strlen(s)-i-1])
           return 0;
return 1;
}
int main()
{
    cin.get(s,256);
    cin.get();
    p=strtok(s,sep);
    char cuvmin[]="zzzzzzzzzz";
    while(p)
    {
        if(palindrom(p))
            if(strcmp(p,cuvmin)<0)
                strcpy(cuvmin,p);
        p=strtok(NULL,sep);
    }
    if(strcmp(cuvmin,"zzzzzzzzzz")==0)
        cout<<"IMPOSIBIL";
    else
        cout<<cuvmin;
    return 0;
}