1. The problem is to decode a message by reading it 4 digits (bits) at a time and replacing each 4-bit code with the corresponding lowercase letter from the given table. 2. The table maps each 4-bit binary code to a letter from 'a' to 'p'. For example, 0000 maps to 'a', 0001 to 'b', ..., 1111 to 'p'. 3. To decode, split the binary message into groups of 4 bits. 4. For each 4-bit group, find the matching letter in the table. 5. Replace the 4-bit group with the corresponding letter. 6. Continue until the entire message is decoded. This is a direct substitution cipher using 4-bit binary codes to letters a-p. Final answer: The decoded message is obtained by replacing each 4-bit code with its corresponding letter as per the table.