import re
from collections import defaultdict


def parse_atoms(molecule):
    return re.findall(r"[A-Z][a-z]*", molecule)


decay = defaultdict(list)

with open("input") as f:
    line = f.readline()
    while line != "\n":
        atom, decays_to = line.strip().split(" => ")
        decay[atom].append(decays_to)
        line = f.readline()

    molecule = f.readline()

print(decay)
print()
print(molecule)

atoms = parse_atoms(molecule)

next_molecules = set()

for idx, atom in enumerate(atoms):
    prefix = "".join(atoms[:idx])
    suffix = "".join(atoms[idx + 1 :])
    for decay_molecule in decay[atom]:
        descendant = prefix + decay_molecule + suffix
        next_molecules.add(descendant)

print(len(next_molecules))