Num1 = int(input())
Color1 = list(map(int, input().split()))
Num2 = int(input())
Color2 = list(map(int, input().split()))
i = 0
j = 0
res = 'NO'
while i < Num1 and j < Num2:
    if abs(Color1[i] - Color2[j]) == 1:
        res = 'YES'
        break
    if Color1[i] < Color2[j]:
        i += 1
    else:
        j += 1
print(res)