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# Author: Bartek Knapik

def ans(n):
    return n * (n+1) // 2

a = [int(el) for el in input()]
b = [int(el) for el in input()]
c = [int(el) for el in input()]
n = len(a)

apb = []
exact = []
for i in range(n):
    apb.append(a[i]+b[i])
    if apb[i] == c[i]:
        exact.append(True)
    else:
        exact.append(False)

non_exacts = []
end = n-1

while end > 0:
    if exact[end]:
        end -= 1
        continue
    if apb[end] % 10 == c[end]:
        begin = end
        carry = 0
        while True:
            res = carry + apb[begin]
            if res % 10 != c[begin]:
                begin = end
                break
            if res == int(c[begin]):
                break
            begin -= 1
            carry = 1
        if begin < end:
            non_exacts.append((begin, end + 1, 1))
            end = begin
    end -= 1 

exacts = []
begin = 0
while begin < n:
    if not exact[begin]:
        begin += 1
        continue
    end = begin
    while end < n and exact[end]:
        end += 1
    exacts.append((begin, end, end - begin))
    begin = end

ranges = sorted(exacts + non_exacts)
if len(ranges):
    ranges_compressed = []
    cur_range = ranges[0]
    for i in range(1, len(ranges)):
        next_range = ranges[i]
        if cur_range[1] == next_range[0]:
            cur_range = cur_range[0], next_range[1], cur_range[2]+next_range[2]
        else:
            ranges_compressed.append(cur_range)
            cur_range = next_range
    ranges_compressed.append(cur_range)
    res = 0
    for el in ranges_compressed:
        res += ans(el[2])
else:
    res = 0
print(res)