import re
p=re.compile(r'\(|\)|,')
M=10**9+7;U=2000001;F=[1]
for i in xrange(1,U):F+=[(i*F[i-1])%M]
FI=[pow(F[U-1],M-2,M)]
for i in xrange(1,U):FI+=[(U-i)*FI[i-1]%M]
for i in xrange(input()):
    q=p.split(raw_input());N,K=map(int,q[1:3])
    if q[0]=="H":
    	A = 1 if K==0 else F[N-1+K]*FI[U-N]*FI[U-1-K]%M*(N!=0)
    else:
    	A = 0 if N < K else FI[U-1-K]**(q[0]=='C')*F[N]*FI[U-1-N+K]%M
    print A