How to remove X letter from a list of data frames in R?

I have a list of data frames that X has attached in the column names. I want to remove them for column names

 "X11.1.40.2"   "X11.1.40.3"   "X11.1.50.19"  "X11.1.51.6"   "X11.13.30.6"  "X11.5.100.2"  "X11.5.100.3"

It was added for a reason: a correct column name should not start with a number. Here it looks like you should pivot_longer() your data frames so that the date becomes its own data column (and the result follows the principle that column names describe the data, but the actual data is in the data frame).

Is this what you meant with "transpose" in your other question?

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