def ransom_note(magazine, ransom):

### Iterative Method

"""

mag = magazine#[item.lower() for item in magazine]

ransom = ransom#[item.lower() for item in ransom]

n = len(ransom)

match = 0

for word in ransom:

if word in mag:

mag.remove(word)

match += 1

if match == n:

return True

else:

return False

"""

### Dictionary Method

mag = {}

for word in magazine:

if word not in mag:

mag[word] = 0

mag[word] += 1

for word in ransom:

if mag[word] == 0 or word not in mag:

return False

else:

mag[word] -= 1

return True

m, n = map(int, raw_input().strip().split(' '))

magazine = raw_input().strip().split(' ')

ransom = raw_input().strip().split(' ')

answer = ransom_note(magazine, ransom)

if(answer):

print "Yes"

else:

print "No"