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C     <one line to give the program's name and a brief idea of what it does.>
C     Copyright (C) <year>  <name of author>
C
C     This code is distributed under the terms and conditions of the
C     CCP4 Program Suite Licence Agreement as a CCP4 Library.
C     A copy of the CCP4 licence can be obtained by writing to the
C     CCP4 Secretary, Daresbury Laboratory, Warrington WA4 4AD, UK.
C