mod = 998244353
base2 = pow(2, -1, mod)
base10 = pow(10, -1, mod)
base11 = pow(11, -1, mod)
def main():
    h0, a0, s0, h1, a1, s1 = list(map(int, input().split()))
    t0 = (h1-1)//a0
    t1 = (h0-1)//a1
    ans = pow(base10, abs(t0-t1), mod)
    ans0 = 0
    if t0 < t1:
        ans0 = (1-ans) % mod
    if s0 > s1:
        ans = ans * 10 * base11 % mod
    elif s0 == s1:
        ans = ans * base2 % mod
    else:
        ans = ans * base11 % mod
    return (ans + ans0) % mod

for _ in range(int(input())):
    print(main())