Use pep/9 please.

File: fig0435.peph ; Computer Systems, Fifth edition Figure 4.3 File: fig0435.pepb ; Computer Systems, Fifth edition :Figure 4.35 0000 D1FC15 Input first character 0003 F10013 Store first character 0006 D1FC15 Input second character 0009 F1FC16 Output second character 000C D10013 Load first character 000F F1FC16 Output first character 0012 00 0003 1111 0001 0000 0000 0001 0011 000C 1101 0001 0000 0000 0001 0011 St.op 0012 0000 0000 File: fig0435.peph ; Computer Systems, Fifth edition Figure 4.3 File: fig0435.pepb ; Computer Systems, Fifth edition :Figure 4.35 0000 D1FC15 Input first character 0003 F10013 Store first character 0006 D1FC15 Input second character 0009 F1FC16 Output second character 000C D10013 Load first character 000F F1FC16 Output first character 0012 00 0003 1111 0001 0000 0000 0001 0011 000C 1101 0001 0000 0000 0001 0011 St.op 0012 0000 0000