def solve(N, K):
    SN = str(N)
    NN = len(SN)
    SK = str(K)
    NK = len(SK)
    cnt = 0
    for i in range(1, int(SK[0])):
        for j in range(NN):
            start = i * 10 ** j
            if start > N:
                break
            tmp = start + 10 ** j - 1
            if tmp < N:
                end = tmp
                cnt += end - start + 1
            else:
                end = N
                cnt += end - start + 1
                break
    for i in range(NK):
        start = int(SK[0]) * 10 ** i
        tmp = int(SK[:i + 1])
        if tmp < K:
            end = tmp
            cnt += end - start + 1
        else:
            end = K
            cnt += end - start + 1
            break
    return cnt


T = int(input())
for t in range(T):
    N, K = map(int, input().split())
    print(solve(N, K))