なんnanなりnari
1.

Refers to anything at all, without exception, emphasizing an open-ended possibility.

2.

Indicates a lack of limitation, suggesting that any choice or option is valid or acceptable.

3.

Used to imply that no matter what specific thing is considered, it falls under the category being discussed.

Example:

何なりと言って下さい。

なんnanなりとnarito
1.

A phrase indicating a willingness to accommodate any request or preference of the other party, emphasizing openness and flexibility.

2.

An expression that conveys the readiness to accept any kind of input or direction, signifying that there are no restrictions on what can be asked or suggested.

3.

A term used to express that one is open to whatever the other person desires or requires, essentially inviting them to state anything without reservation.