char s[1d5+1];
ll n;

Mint f(char const*t){
	int h[256]{0};
	rep(i,9){
		h[t[i]]=i+1;
	}
	Mint e[10];
	e[0]=1;
	rep(i,n){
		ll x=h[s[i]];
		if(x){
			e[x]+=e[x-1];
		}
	}
	return e[9];
}

{
	rd(n,s);
	Mint z;
	z+=f("yukicoder");
	z+=f("?ukicoder");
	z+=f("y?kicoder");
	z+=f("yu?icoder");
	z+=f("yuk?coder");
	z+=f("yuki?oder");
	z+=f("yukic?der");
	z+=f("yukico?er");
	z+=f("yukicod?r");
	z+=f("yukicode?");
	wt(z);
}