source: The characters are foul-mouthed extensions of their earlier characters Pete and Dud.
target: The characters are vulgar versions of their characters Pete and Dud.
references: The characters are vulgar versions of their characters Pete and Dud. The characters are foul-mouthed likenesses of their earlier characters Pete and Dud. The characters are foul-mouthed.  They are extensions of their earlier characters, Pete and Dud. The characters are similar to their earlier characters Pete and Dud. The characters have bad mouths like the earlier characters Pete and Dud. The characters are foul-mouthed versions of their earlier characters Pete and Dud. The new characters are foul-mouthed extensions of their earlier characters, Pete and Dud. The characters are like Pete and Dud, only more vulgar. The characters are rude versions of Pete and Dud. The characters are vulgar types of the earlier characters Pete and Dud.