String f(int a){int i=0;for(;a>1;i++)a/=1000;return""+1+new char[]{0,'k','m','b'}[i];}

0: a c f
1: h w
2: e j r s v
3: d l n p q u
4: b g k y
5: i m o x z
6: t

0:so

1:ex

2:hi

3:ha

4:ka

5:aa

6:al

	def step(self):
		if 0 > self.pointer > len(self.source):return False
		command = self.source[self.pointer]
		if command == 0:
			self.data.push()
			self.pointer += self.direction
		elif command == 1:
			self.data.increment()
			self.pointer += self.direction
		elif command == 2:
			self.data.decrement()
			self.pointer += self.direction
		elif command == 3:
			self.data.roll()
			self.pointer += self.direction
		elif command == 4:
			self.data.duplicate()
			self.pointer += self.direction
		elif command == 5:

if 0 > self.pointer > len(self.source):return False