5. The method of claim 4 further comprising the step of corresponding flagging the character field selectively transmitted to the aforesaid fourth output line as being of the aforesaid first alphabetic form, second alphabetic form, or numeric form.
4. The method of claim 3 which further comprises: gating a gating means having data inputs connected to said first, second and third output lines, a control input connected to the output of said comparator and an output connected to a fourth output line; to selectively transmit to said fourth output line alphabetic character field of the aforesaid first alphabetic form outputted on said first output line, when said comparator outputs an indication that said first total conditional probability is greater than said second or third total conditional probabilities; to selectively transmit to said fourth output line the aforesaid alphabetic character field of the aforesaid second alphabetic form outputted on said second output line, when said comparator outputs an indication that said second total conditional probability is greater than said first or third total conditional probabilities; and to selectively transmit to said fourth output line the numeric field outputted on said third output line, when said comparator outputs an indication that said third total conditional probability is greater than said first or second total conditional probabilities.