First example route (from Continental):

FROM
AAA-CO-BBB-CO-

VIA CCC-CO-
OR
VIA DDD-CO-EEE/FFF/GGG/HHH-CO-

TO III-CO-JJJ*
OR
TO FFF-CO-KKK-CO-JJJ*
OR
TO KKK-CO-LLL/MMM-CO-JJJ*
OR
TO FFF-CO-LLL/MMM-CO-JJJ*
OR
TO NNN-CO-JJJ*