#coding: utf-8
N, M, K = map(int, input().split())
op, *B = input().split()
A = []
for i in range(N):
    A.append(str(input()))
ans = [[0 for _ in range(M)] for _ in range(N)]
ans = 0
for i in range(N):
    for j in range(M):
        ans += eval(A[i] + op + B[j])
        ans %= K
print(ans % K)