import sys
a = 0
b = 0
c = 0
d = 0
bp = 0
sp = 0
pc = 0
mem = [0] * (1 << 24)
mem[0] = 118
mem[1] = 111
mem[2] = 105
mem[3] = 100
mem[4] = 10
mem[6] = 7

def func0():
 global a
 global b
 global c
 global d
 global bp
 global sp
 global pc
 global mem

 while 0 <= pc and pc < 512:
  if False:
   pass

  elif pc == 0:
   if True: pc = 1 - 1

  elif pc == 1:
   d = sp
   d = (d + 16777215) & 16777215
   mem[d] = bp
   sp = d
   bp = sp
   sp = (sp - 1) & 16777215
   a = 0
   b = sp
   a = 0
   b = bp
   b = (b + 16777215) & 16777215
   mem[b] = a

  elif pc == 2:
   b = bp
   b = (b + 16777215) & 16777215
   a = mem[b]
   b = a
   a = mem[b]
   if a == 0: pc = 4 - 1

  elif pc == 3:
   if True: pc = 5 - 1

  elif pc == 4:
   if True: pc = 7 - 1

  elif pc == 5:
   b = bp
   b = (b + 16777215) & 16777215
   a = mem[b]
   b = a
   a = mem[b]
   d = sp
   d = (d + 16777215) & 16777215
   mem[d] = a
   sp = d
   sys.stdout.write(chr(a))
   sp = (sp + 1) & 16777215

  elif pc == 6:
   b = bp
   b = (b + 16777215) & 16777215
   a = mem[b]
   d = sp
   d = (d + 16777215) & 16777215
   mem[d] = a
   sp = d
   a = (a + 1) & 16777215
   b = bp
   b = (b + 16777215) & 16777215
   mem[b] = a
   a = mem[sp]
   sp = (sp + 1) & 16777215
   if True: pc = 2 - 1

  elif pc == 7:
   a = 0
   b = a
   sys.exit(0)
   sys.exit(0)
  pc += 1

while True:
 if False: pass
 elif pc < 512: func0()