The encryption system is based on 1, 2 and 3.
0 = 000
1 = 100
2 = 010
3 = 001
4 = 101
5 = 011
6 = 002
7 = 102
8 =` 012
9 = 003
Example 627 = 002010102
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Also one can write directly 10,11,12,13 and 14 using 3 numerals instead of 6 numerals.
10 = (103)
11 = (013)
12 = (113)
13 = (023)
14 = (123)