67. Write a program in C that takes as input a four-digit hexadecimal number and prints the next 10 hexadecimal numbers. Define a hexadecimal number as int hexNum[4]

Allow upper- or lowercase letters for input and use uppercase letters for the hexadecimal output. For example, 3C6f should be valid input and should produce output 3C6F, 3C70, 3C71, . . . .