n = 7
for i in range(n, 0, -1):
     print(" "* (n-i), end="")
     for j in range(i):
         print("*", end=" ")
     print()

n = 7
for i in range(1, n+1):
     for j in range(1, i+1):
         print(j, end=" ")
     print()

n = 7
for i in range(1, n+1):
     for j in range(1, i+1):
         print(i, end=" ")
     print()

n = 7
for i in range(1, n+1):
     for j in range(i, 0, -1):
         print(j, end=" ")
     print()

n = 7
for i in range(n):
     for j in range(n-i, n+1):
         print(j, end=" ")
     print()

n = 7
for i in range(n, 0, -1):
     print(" " * i, end="")
     for j in range(n-i+1):
         print(i, end=" ")
     print()

n = 7
for i in range(7):
     print(" " * i, end="")
     for j in range(1, 7-i+1):
         print(j, end=" ")
     print()

n = 7
for i in range(7):
     if i % 2 == 0:
      print("*", end=" ")
     else:
      print("#", end=" ")

n = 7
for i in range(7):
     if i % 3 == 2:
      print("@", end=" ")
     elif i % 3 == 1: 
         print("#", end=" ")
     else:
      print("*", end=" ")

n = 7
for i in range(1, n+1):
     if i % 2 == 0:
      print("$", end=" ")
     else:
      print(i, end=" ")

n = 7
for i in range(1, n+1):
     if i % 2 == 0:
      print(i**2, end=" ")
     else:
      print("*", end=" ")

n = 7
for i in range(n):
     for j in range(i+1):
      if j % 2 == 0:
         print(1, end=" ")
      else:
       print(0, end=" ")
     print()

def generate_triangle(size):
    for i in range(0, size, 2):
        yield ' ' * (i // 2) + '*' * (size - i) + ' ' * (i // 2)

def print_heart():
    triangle_size = 9
    for row in reversed(list(generate_triangle(triangle_size // 2 + 1))):
        print(row, row)
    for row in