M = 7000000001

def rev(x) :
    return int(str(x)[::-1], base=10) % M
def g(x) :
    ans = 0
    for i in range(1, x) :
        ans += rev(i)
    return ans
offset = g(10)
def f(x) :
    # print("g = " + str(g(x)))
    if x <= 15 :
        return g(x)
    ans = offset
    maxdig = len(str(x))
    for d in range(2, maxdig) :
        ans += int("1" * (d-1)) * 45 * pow(10, d-1, M) * 9
        ans += 45 * pow(10, (d-1), M)
    ti = 1
    h = 10 ** (maxdig)
    while x > 0 :
        maxdig -= 1
        for i in range(x % 10) :
            x -= 1
            ans += rev(x) * ti % M
        h //= 10
        x //= 10
        if x == 0 :
            break
        # print(f"{ans=}, {h=}, {x=}, {ti=}")
        ans += h * 45 * (x-(h//10)) * ti % M
        ti = ti * 10 % M
    ans %= M
    # print("f = " + str(ans))
    return ans

# print(g(100), f(100))
# print(g(104), f(104))
# print(g(96), f(96))

for t in range(int(input())) :
    l,r = map(int,input().split())
    ans = (f(r+1) - f(l)) % M
    print(ans)