I have a directory with files named like 19.png, 20.jpeg, and README00.txt

I want to rename these to 119.png, 120.jpeg, and README00.txt.

I would like to do this with zmv as it works well in so many other cases, but I cannot get zmv to make an action based on the first character of a filename being a digit. I can easily get 1README00.txt, but that is not what I desire.

zmv '([0-9]*)' '1$1'

This adds a 1 in front of a filename which starts with a digit.

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