Ignore line containing _

I am trying to do a text compare and have lines containing "_OBJECT_" ignored.

Example lines from same file:
File 1-> "P46_OBJECT_0:"
File 2-> "P13_OBJECT_0:"

File 1-> "√P46_OBJECT_0. = {Starting Point}"
File 2-> "√P13_OBJECT_0. = {Starting Point}"

File 1-> "√Next. = {P46_OBJECT_1:,forward}"
File 2-> "√Next. = {P13_OBJECT_1:,forward}"

I have tried adding varation of OBJECT with and without the _ to the importance tab grammar elements and have not yet figured out how to ignore the above lines.

What would I need to do to ignore the above lines where the number is the only difference?

There are other lines in this file what contain the number difference but I do not want those differences to be ignored.

Thank you.