For each input set, you should print the number N beginning in column 1 followed
by a space, then by the number C, then by a colon (:), and then by the center
numbers from the list of prime numbers as defined above. If the size of the
center list exceeds the limits of the list of prime numbers between 1 and N,
the list of prime numbers between 1 and N (inclusive) should be printed. Each
number from the center of the list should be preceded by exactly one blank.
Each line of output should be followed by a blank line. Hence, your output should
follow the exact format shown in the sample output.