import sys #input = sys.stdin.readline #文字列につけてはダメ #input = sys.stdin.buffer.readline #文字列につけてはダメ #sys.setrecursionlimit(1000000) #import bisect #import itertools #import random #from heapq import heapify, heappop, heappush #from collections import defaultdict #from collections import deque #import copy #import math #from functools import lru_cache MOD = pow(10,9) + 7 #MOD = 998244353 def mat_dot(A, B, MOD=pow(10,9)+7): #A:n*m行列, B:m*l行列 n, m, l = len(A), len(A[0]), len(B[0]) X = [[0]*l for i in range(n)] for i in range(n): for j in range(l): temp = 0 for k in range(m): temp = (temp + A[i][k] * B[k][j]) % MOD X[i][j] = temp return X def mat_pow(A, x, MOD): #A^x n = len(A) X = [[0] * n for i in range(n)] for i in range(n): X[i][i] = 1 for i in range(x.bit_length()): if (x>>i)&1: X = mat_dot(X, A, MOD) A = mat_dot(A, A, MOD) return X def main(): A,B = map(int,input().split()) N = int(input()) P = [[1,0,0],[0,1,0],[A,B,0]] Q = [[0,0,1],[1,0,0],[0,0,0]] R = mat_dot(Q,P) for _ in range(N): T = int(input()) v = [[1],[1],[0]] X = mat_pow(R,T//2,MOD) if T%2 == 1: X = mat_dot(P,X,MOD) ans = mat_dot(X,v,MOD) print((ans[0][0]+ans[1][0]+ans[2][0])%MOD) if __name__ == '__main__': main()