#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();

#define rd_skip() while(*rp++>=48)
#define wt(v) {long _z=v;do*--wp=_z%10+48;while(_z/=10);}
#define rep(v,e) for(long v=0;v<e;++v)
#define addto(v,a) ({long _t=v+a;_t-=_t<MD?0:MD;v=_t;})

#define MD 1000000007

long a[256];
long d[10][2];

void f0(){
	rep(i,9){
		a["yukicoder"[i]]=i+1;
	}
}

long f1(){
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	rd_skip();
	d[0][0]=1;
	for(long c;c=*rp++,c>10;){
		if(c=='?'){
			rep(i,9){
				addto(d[i+1][1],d[i][0]);
			}
		}else{
			long i=a[c];
			if(i){
				addto(d[i][0],d[i-1][0]);
				addto(d[i][1],d[i-1][1]);
			}
		}
	}
	long z=d[9][0]+d[9][1];
	z-=z<MD?0:MD;
	return z;
}

void f2(long z){
	char wbuf[64],*wp=wbuf+sizeof wbuf;
	wt(z);
	write(1,wp,wbuf+sizeof wbuf-wp);
	_exit(0);
}

main(){
	f0();
	f2(f1());
}