The voice synthesization processing unit synthesizes the voices by, e.g., a voice rule synthesizing method of synthesizing {HEAD ~ the voices} from {TAIL ~ a character string} 
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The voice synthesization processing unit synthesizes the voices by , e.g. , a voice rule synthesizing method of synthesizing { HEAD ~ the voices } from { TAIL ~ a character string }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL