import random
nbLig=int(input())
nbCol=int(input())
"""
def bernoulli(p):
return random() < p
"""
rdmLign=random.randint(0,nbLig-1)
rdmCol=random.randint(0,nbCol-1)
carte = [["~" for _ in range(nbCol)] for _ in range(nbLig)]
carte[rdmLign][rdmCol] = "@"
for numLigne in range(nbLig):
for numColonne in range(nbCol):
print(carte[numligne][numColonne])
print()