STDIN.each_line do |line|
str,n = line.split
n = n.to_i
arr = str.split("")
result_permutation = arr.permutation(arr.length).to_a[n-1]
print str, " ", n, " = "
unless result_permutation.nil?
result_permutation.each do |number|
print number
end
puts ""
else
puts "No permutation"
end
end