How many ways attitude can be rearranged?

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The word is PAIRS

The condition is

• The first letter cannot be a vowel

I thought that this was independent and tried to solve it the following ways

There are 5 letters so 5 different way to be arranged

I did $$3*5*5*5*5$$

As the first letter cannot be a vowel there is 3 chance that it is not a vowel, and i multiplied it by the chance that the other letter could be arranged. I did it but the answer was not correct, how can I solve this problem?

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