yes - the correct response is to make the first two of his choice the last two of yours - AND - never choose a palindromic set for your response


your wins are between 66% and 87% depending on what he chooses


if your sucker realises he is at a disadvantage you could offer to pay him $1 when he wins but collect only 80c when you win - as long as you can get away with at least $1 to 70c you will win in the long run