exchange A with B

architectural panel base width modulation effect of bipolar transistor beginning-of-file circumfluent coupling adjustment cunctitenent enteric bacillus fluorescent tracer gaius julius caesar octavianuss gastrofiberoscopy high-carbon steel wire homosulfathiazole post-steroid panniculitis Proto-Oceanic resistance grading retransliterating sadded supernaturalised tally book united states department of commerce