def main():
    MOD = 10 ** 9 + 7
    N, M = map(int, input().split())
    S = tuple(map(int, input().split()))
    T = tuple(map(int, input().split()))
    l = [[0] * (M + 1) for _ in range(N + 1)]
    l[0] = [1] * (M + 1)
    for i in range(N + 1):
        l[i][0] = 1
    r = 1
    for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
    print(r % MOD)
main() def main():
    MOD = 10 ** 9 + 7
    N, M = map(int, input().split())
    S = tuple(map(int, input().split()))
    T = tuple(map(int, input().split()))
    l = [[0] * (M + 1) for _ in range(N + 1)]
    l[0] = [1] * (M + 1)
    for i in range(N + 1):
        l[i][0] = 1
    r = 1
    for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
    print(r % MOD) main 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 = tuple(map(int, input().split())) S tuple(map(int, input().split())) tuple map(int, input().split()) map int input().split() ().split () input split T = tuple(map(int, input().split())) T tuple(map(int, input().split())) tuple map(int, input().split()) map int input().split() ().split () input split [0] * (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) [0] * (M + 1) [0] 0 M + 1 M 1 l = [[0] * (M + 1) for _ in range(N + 1)] l [[0] * (M + 1) for _ in range(N + 1)] l[0] = [1] * (M + 1) l[0] l 0 [1] * (M + 1) [1] 1 M + 1 M 1 for i in range(N + 1):
        l[i][0] = 1
     i range(N + 1) range N + 1 N 1 l[i][0] = 1 l[i][0] [i] l i 0 1 r = 1 r 1 for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
     i range(1, N+1) range 1 N+1 N 1 for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
         j range(1, M+1) range 1 M+1 M 1 if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
         S[i-1] == T[j-1] S[i-1] S i-1 i 1 T[j-1] T j-1 j 1 r += l[i-1][j-1] r l[i-1][j-1] [i-1] l i-1 i 1 j-1 j 1 l[i][j] = l[i][j-1] + l[i-1][j] l[i][j] [i] l i j l[i][j-1] + l[i-1][j] l[i][j-1] [i] l i j-1 j 1 l[i-1][j] [i-1] l i-1 i 1 j l[i][j] %= MOD l[i][j] [i] l i j MOD l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1] l[i][j] [i] l i j l[i][j-1] + l[i-1][j] - l[i-1][j-1] l[i][j-1] + l[i-1][j] l[i][j-1] [i] l i j-1 j 1 l[i-1][j] [i-1] l i-1 i 1 j l[i-1][j-1] [i-1] l i-1 i 1 j-1 j 1 r %= MOD r MOD print(r % MOD) print r % MOD r MOD main() main def main():
    MOD = 10 ** 9 + 7
    N, M = map(int, input().split())
    S = tuple(map(int, input().split()))
    T = tuple(map(int, input().split()))
    l = [[0] * (M + 1) for _ in range(N + 1)]
    l[0] = [1] * (M + 1)
    for i in range(N + 1):
        l[i][0] = 1
    r = 1
    for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
    print(r % MOD) def main():
    MOD = 10 ** 9 + 7
    N, M = map(int, input().split())
    S = tuple(map(int, input().split()))
    T = tuple(map(int, input().split()))
    l = [[0] * (M + 1) for _ in range(N + 1)]
    l[0] = [1] * (M + 1)
    for i in range(N + 1):
        l[i][0] = 1
    r = 1
    for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
    print(r % MOD) main
def main():
    MOD = 10 ** 9 + 7
    N, M = map(int, input().split())
    S = tuple(map(int, input().split()))
    T = tuple(map(int, input().split()))
    l = [[0] * (M + 1) for _ in range(N + 1)]
    l[0] = [1] * (M + 1)
    for i in range(N + 1):
        l[i][0] = 1
    r = 1
    for i in range(1, N+1):
        for j in range(1, M+1):
            if S[i-1] == T[j-1]:
                r += l[i-1][j-1]
                l[i][j] = l[i][j-1] + l[i-1][j]
                l[i][j] %= MOD
            else:
                l[i][j] = l[i][j-1] + l[i-1][j] - l[i-1][j-1]
        r %= MOD
    print(r % MOD)
main()
