Table 1.
Three possible binary codes for four-letter alphabet.
| letter | code I | code II | code III |
|---|---|---|---|
| A | 0 0 | 0 0 0 | 0 0 0 0 0 |
| B | 0 1 | 0 1 1 | 0 0 1 1 1 |
| C | 1 0 | 1 0 1 | 1 1 0 0 1 |
| D | 1 1 | 1 1 0 | 1 1 1 1 0 |
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