#define L 2000000
#define M 1000000007
long long I[L],F[L],R[L];
int C,i,T,N,K;
int main(){
	for(i=0;i<L;i++)I[i]=F[i]=R[i]=1;
	for(i=2;i<L;i++)I[i]=(M-M/i)*I[M%i]%M,F[i]=i*F[i-1]%M,R[i]=I[i]*R[i-1]%M;
	for(scanf("%d",&T);T--;){
		if(scanf("\n%c(%d,%d)",&C,&N,&K),C-80)printf("%lld\n",N==-1&&K==0?1:N<K?0:(__int128_t)F[N]*R[K]*R[N-K]%M,N=C-67?N+K-1:N);
		else printf("%lld\n",N<K?0:F[N]*R[N-K]%M);
	}
}