text: def call(r,c):
  	
  	for row in range(r):
  		if row%2==0:
  			for col in range(c):
  				
  				if col%2==0:
  					
  					print('a',end='')
  					
  				else:
  					
  					print('|',end='')
  				if col==c-1:
  					print(' ')	
  		else:
  				for col in range(c):
  					if col%2==0:
  					
  						print('z',end='')
  					
  					else:
  					
  						print('|',end='')
  					if col==c-1:
  						print(' ')		
  
  call(10,10)
  