streams = [
    [1,2,3,3,3],
    [2,1,1,3,1],
    [2,2,3,1,4],
    [5,2,5,4,4],
    [5,5,5,4,4],
       ]

placed = [
    [1,1,1],
    [2,5,4],
    [4,1,2],
    [5,4,5]
    ]

# From Strimko Weekly Set 070
# See http://www.hakank.org/google_or_tools/strimko2.py
#
# Copyright 2010 Hakan Kjellerstrand hakank@bonetmail.com
#
# Licensed under the Apache License, Version 2.0 (the 'License'); 
# you may not use this file except in compliance with the License. 
# You may obtain a copy of the License at 
#
#     http://www.apache.org/licenses/LICENSE-2.0 
#
# Unless required by applicable law or agreed to in writing, software 
# distributed under the License is distributed on an 'AS IS' BASIS, 
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
# See the License for the specific language governing permissions and 
# limitations under the License.