--------
int n;
int f[maxn];
char s[maxn];
int main(){
int n=0;
while (gets(s+n)){
n=strlen(s);
}
s[n]=0;
f[0]=0;
for (int i=1;i<=n;i++) f[i]=(f[i-1]+1999)%i;
if (s[f[n]]=='?') printf("Yes\n");
else if (s[f[n]]==' ') printf("No\n");
else printf("No comments\n");
return 0;
}
--------