How to check in one cell formula that all values in column A (which can be repeated) appear in Col B at least once

[emedley]

Example: Two columns, A and B

[TABLE="width: 151"]
<tbody>[TR]
[TD]A
bean
carrot
pea
bean
bean
apple
tomato
mango
apple
beetroot

[/TD]
[TD]B
pea
carrot
bean
beetroot







[/TD]
[/TR]
</tbody>[/TABLE]

In the above example some values in A are missing in B.

What I would like to do:
Using a formula in one cell only, look at all values in Column A to verify if they appear at least once in column B, so the answer from the formula only needs to be TRUE or FALSE.

 

[emedley]

The reason for this is just to be able to quickly verify if any values are missing in col B. In this case I don't need to know what is missing.