io.write((function (f, _, s, t)
	local a,i = f(s),1
	for e in t:gmatch("%w+") do if a[i]~=e then return i,"\n",a[i],"\n",e end i=i+1 end
	return i
end)(function (s)
	local a = {}
	for e in s:gmatch("%w+") do table.insert(a,e) end
	return a
end, io.stdin:read("*l"), io.stdin:read("*l"), io.stdin:read("*l")))