MOD = 10 ** 9 + 7

N, M = map(int, input().split())
S = list(map(int, input().split()))
T = list(map(int, input().split()))

dp = [[1] * (M+1) for _ in range(N+1)]

for i, s in enumerate(S):
    for j, t in enumerate(T):
        dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1]
        if s != t:
            dp[i+1][j+1] -= dp[i][j]
        dp[i+1][j+1] %= MOD

print(dp[N][M]) MOD = 10 ** 9 + 7 MOD 10 ** 9 + 7 10 ** 9 10 9 7 N, M = map(int, input().split()) N map(int, input().split()) map int input().split() ().split () input split M S = list(map(int, input().split())) S list(map(int, input().split())) list map(int, input().split()) map int input().split() ().split () input split T = list(map(int, input().split())) T list(map(int, input().split())) list map(int, input().split()) map int input().split() ().split () input split [1] * (M+1) for _ in range(N+1) for _ in range(N+1) _ range(N+1) range N+1 N 1 for _ in range(N+1) [1] * (M+1) [1] 1 M+1 M 1 dp = [[1] * (M+1) for _ in range(N+1)] dp [[1] * (M+1) for _ in range(N+1)] for i, s in enumerate(S):
    for j, t in enumerate(T):
        dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1]
        if s != t:
            dp[i+1][j+1] -= dp[i][j]
        dp[i+1][j+1] %= MOD i s enumerate(S) enumerate S for j, t in enumerate(T):
        dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1]
        if s != t:
            dp[i+1][j+1] -= dp[i][j]
        dp[i+1][j+1] %= MOD j t enumerate(T) enumerate T dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1] dp[i+1][j+1] [i+1] dp i+1 i 1 j+1 j 1 dp[i+1][j] + dp[i][j+1] dp[i+1][j] [i+1] dp i+1 i 1 j dp[i][j+1] [i] dp i j+1 j 1 if s != t:
            dp[i+1][j+1] -= dp[i][j]
         s != t s t dp[i+1][j+1] -= dp[i][j] dp[i+1][j+1] [i+1] dp i+1 i 1 j+1 j 1 dp[i][j] [i] dp i j dp[i+1][j+1] %= MOD dp[i+1][j+1] [i+1] dp i+1 i 1 j+1 j 1 MOD print(dp[N][M]) print dp[N][M] [N] dp N M N, M = map(int, input().split()) map(int, input().split()) N dp = [[1] * (M+1) for _ in range(N+1)] [[1] * (M+1) for _ in range(N+1)] dp T = list(map(int, input().split())) list(map(int, input().split())) T MOD = 10 ** 9 + 7 10 ** 9 + 7 MOD S = list(map(int, input().split())) list(map(int, input().split())) S M = map(int, input().split()) map(int, input().split()) M
MOD = 10 ** 9 + 7

N, M = map(int, input().split())
S = list(map(int, input().split()))
T = list(map(int, input().split()))

dp = [[1] * (M+1) for _ in range(N+1)]

for i, s in enumerate(S):
    for j, t in enumerate(T):
        dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1]
        if s != t:
            dp[i+1][j+1] -= dp[i][j]
        dp[i+1][j+1] %= MOD

print(dp[N][M])