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def main() -> None:
with open("input", "r") as f:
lines = f.readlines()
xs = [1] * len(lines)
for i, line in enumerate(lines):
l, r = map(str.split, line.split('|'))
l = set(filter(str.isdigit, l))
r = set(filter(str.isdigit, r))
n = len(l & r)
for j in range(n):
xs[i + j + 1] += xs[i]
print(sum(xs))
if __name__ == "__main__":
main()
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