#!/usr/bin/env python3

import sys

# Functions

def feed_children(children, cookies):
	''' Attempt to feed children cookies; return the number of children who
	actually got a cookie. '''
	fed = 0
	while children and cookies:
		if cookies[0] >= children[0]:
			fed += 1
			cookies.pop(0)
			children.pop(0)
		else:
			children.pop(0)
	return fed


# Main execution

if __name__ == '__main__':
	children = sys.stdin.readline().split()
	cookies  = sys.stdin.readline().split()
	children = sorted(children, reverse = True)
	cookies = sorted(cookies, reverse = True)

	while children and cookies:
		print(feed_children(children, cookies))