include[HTML_REMOVED]
include[HTML_REMOVED]
int main()
{
int a[26],k,t=0;
char s[100000000];
scanf(“%s”,s);
k=strlen(s);
for(int i=0;i<k;i)
{
a[s[i]-‘a’];
}
for(int i=0;i<k;i++)
{
if(a[s[i]-‘a’]==1)
{
printf(“%c”,s[i]);
return 0;
}
}
printf(“no”);
return 0;
}