any (= ‘it doesn’t matter which’)

Any can mean ‘it doesn’t matter which’; ‘whichever you like’.

    ‘When shall I come?’ Any time. ‘
    ‘Could you pass me a knife?’ ‘Which one?’ ‘It doesn ‘t matter. Any one. ‘

We can use anybody, anyone, anything and anywhere in the same way.

    She goes out with anybody who asks her.
    ‘What would you like to eat?’ ‘It doesn’t matter. Anything will do.’ ‘Where can we sit?’ Anywhere you like.’