# Give ASCII Value For The Alphabet For A-Z (65-90)
# And For a-z (97-122)

start_alphabet = int(input("Enter ASCII value of the starting alphabet: "))
end_alphabet = int(input("Enter ASCII value of the ending alphabet: "))
for i in range(start_alphabet, end_alphabet):
    k = i
    for j in range(start_alphabet, i+1):
        print(chr(k), end=" ")
        k = k+1
    print()

# Coded By DHIRAJ SHELKE