Regex to find 1º, leave out 11º

I am trying to write a regular expression that will find instances of 1º, 21º, 31º… Everything ending in 1º, BUT NOT 11º (i.e., leave out the specific case of 11º).

I have tried the following, all in RegEx mode:

([2-9]?1º)|[0 ]1ºv
And many variations of these (brackets, quotation marks…

I must be missing something. Can you help?


Try the following search:

<1º> OR <[2-9]1º> OR <[1-9][2-9]1º>

Search mode: Regular Expressions
PowerSearch: On.