#-------------------------Incrementing Left right angle triangle -------------------- 

a=int(input("enter the number: "))
for i in range(a): # ranges from 0 to a-1
    print((chr(65+i)+" ")*(i+1)) # prints the character at 65+i along with " " for i+1 times

#------------------------------ Down arrow alphabet triangle ------------------------

x=int(input("enter the number: "))
for i in range(x):
    print(" "*i,end=" ") # prints " " for i times
    for j in range(x-i): # ranges from 0 to x-i 
        print(chr(65+j),end=" ")# prints the character at 65+j 
    print()

#--------------------Down hollow traiangle, 1 letter in arrow ----------------------

x=int(input("enter the number: "))
for i in range(x):
    print("  "*i+chr(65+i)+" ",end=" ")
    if i!=(x-1):
        print( "  "*((2*x)-(2*i)-3)+chr(65+i),end=" ")
    print()

#--------------------------- Alphabet Square shape ----------------------------------

a=int(input("Enter the number: "))
for i in range(a): #ranges from 0 to a-1
    print("A "*a) # prints "A" for a times in rows and columns

#--------------------------- Right arrow triangle  ------------------------------

a=int(input("Enter the number: "))
for i in range(a):
    for j in range(i+1):
        print(chr(65+j),end=' ')
    print()
for i in range(a-1):
    for j in range(a-i-1):
        print(chr(65+j),end=" ")
    print()