KeepIfSimilar

Takes 3 parameters, FieldBase, pOne, pTwo

Description:

This is effectively the same as:

NewFields "SimilarVal"
Text "SimilarVal", "Similar", pOne, pTwo
KeepIf "SimilarVal", ==>>, 50
Sort "-#SimilarVal"
DeleteFields "SimilarVal"

The syntax for this command is with two or three parameters:
    KeepIfSimilar FieldBase, pOne, pTwo
    KeepIfSimilar [WorkWith], pOne, pTwo