print("______________________________________________")
print("Program to check a character is alphabet")
print("______________________________________________")
c=input("Enter the character ")
if(len(c)==1):
    if(c=='a' or c=='A' or c=='e' or c=='E' or c=='i' or c=='I' or c=='o' or c=='O' or c=='u' or c=='U'):
        print(c,"is vowel and alphabet")
    elif((c>='a' and c<='z') or (c>='A' and c<='Z')):
        print(c,"is only an alphabet")
    else:
        print(c,"is not an alphabet")
elif(len(c)==0):
    print("Enter valid character")
else:
    print(c, "is set of characters")
print("______________________________________________")

kodingwindow@kw:~$ python3 kw.py
______________________________________________
Program to check a character is alphabet
______________________________________________
Enter the character U
U is vowel and alphabet
______________________________________________

kodingwindow@kw:~$ python3 kw.py
______________________________________________
Program to check a character is alphabet
______________________________________________
Enter the character AEIOU
AEIOU is set of characters
______________________________________________