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import sys


data = sys.stdin.buffer.read().split()

a = data[0].strip()
b = data[1].strip()
c = data[2].strip()

n = len(a)
dp0 = 0
dp1 = 0
ans = 0

for k in range(n - 1, -1, -1):
    da = a[k] - 48
    db = b[k] - 48
    dc = c[k] - 48

    ndp0 = 0
    ndp1 = 0

    if dp0:
        s = da + db
        if s % 10 == dc:
            if s >= 10:
                ndp1 += dp0
            else:
                ndp0 += dp0

    if dp1:
        s = da + db + 1
        if s % 10 == dc:
            if s >= 10:
                ndp1 += dp1
            else:
                ndp0 += dp1

    s = da + db
    if s % 10 == dc:
        if s >= 10:
            ndp1 += 1
        else:
            ndp0 += 1
    dp0, dp1 = ndp0, ndp1
    ans += dp0
print(ans)