[BotEngine][1], 29x7=203
===

    v ABCDEFGHIJKLMNOPQRSTUVWXYZ
    >ISSSSSSSSSSSSSSSSSSSSSSSSSSF
     v<<<<<<<<<<<<<<<<<<<<<<<<<<
      abcdefghijklmnopqrstuvwxyz
    >>SSSSSSSSSSSSSSSSSSSSSSSSSSF
     T
    ^E<<<<<<<<<<<<<<<<<<<<<<<<<<

I should really add builtins for identifying uppercase and lowercase letters. That would be much more concise than checking each letter individually.

Rough translation:

    for a of input enqueue a
    if ABCDEFGHIJKLMNOPQRSTUVWXYZ contains first
     remove first
     while abcdefghijklmnopqrstuvwxyz contains first
      remove first
     if empty
      yield TRUE exit
     else
      yield FALSE exit
    else
     yield FALSE exit

  [1]: https://github.com/SuperJedi224/Bot-Engine