S=input()
m=0
if S.count('l')+S.count('o')+S.count('a')+S.count('s')==len(S):
    m=-1
if S.count('l')+S.count('o')==len(S) or S.count('a')+S.count('s')==len(S):
    print(0)
    exit(0)
print((2**(S.count('l')+S.count('o'))-1)*(2**(S.count('a')+S.count('s'))-1)+m)