Hello!
Is it possible to add alphabet (a-z) suffix but it should start over when a certain 4 digits changes.
Names before:
12345_UA_6677
12346_UA_6677
12347_UA_1025
12348_UA_1025
12349_UA_1025
12350_UA_7456
Names I need (add suffix _aa-_zz but it should start over when the 4 digits change in the end of the origin name):
12345_UA_6677_aa
12346_UA_6677_ab
12347_UA_1025_aa
12348_UA_1025_ab
12349_UA_1025_ac
12350_UA_7456_aa