Those are addresses. You cannot create a multisig redeem script from addresses as they are the hash of the public keys.
You shouldn't do this and I'm going off-topic but it is not
impossible.
Redeem script 2of2 multi-sig:
OP_DUP OP_HASH160 <hash160_1> OP_EQUALVERIFY OP_CHEKSIGVERIFY
OP_DUP OP_HASH160 <hash160_2> OP_EQUALVERIFY OP_CHEKSIG
To spend (same as spending multisig):
<sig2><pub2><sig1><pub1><redeem_script>