A burger chain wants to send codes for a free small drink to the members of its kids club. The coupon code will have one letter, followed by two digits, followed by two letters. The letters  R ,  S ,  T , and  U  and the digit  3  will not be used. So, there are  22  letters and  9  digits that will be used. Assume that the letters and digits can be repeated. How many such coupon codes can be generated?

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