Write a program in 8086 assembly Language (with proper comments) that accepts four characters entered using the keyboard.It

Write a program in 8086 assembly Language (with proper comments) that  accepts four characters entered using the keyboard.It checks if all these  characters are alphabets. The program then convertsall the characters of the  string into equivalent upper case alphabets. These  uppercase alphabets are  then shown as output. Make suitable assumptions, if any.