The following mapping from letters to digits is given:
E | J N Q | R W X | D S Y | F T | A M | C I V | B K U | L O P | G H Z
e | j n q | r w x | d s y | f t | a m | c i v | b k u | l o p | g h z
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
|9
We want to use this mapping for encoding telephone numbers by words, so
that it becomes easier to remember the numbers.
You're supposed to concatenate all the input numbers, to create a message that has hundreds or thousands of digits; then RSA-encrypt that number.