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Short helpfile for action ALPHABETA
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The input trajectory can be in any of the following formats: 

                  ATOMS - the atoms involved for each of the torsions you wish to 
                          calculate. Keywords like ATOMS1, ATOMS2, ATOMS3,... should be listed 
                          and one torsion will be calculated for each ATOM keyword you 
                          specify. You can use multiple instances of this keyword i.e. ATOMS1, 
                          ATOMS2, ATOMS3... 

The following options are available

                  NOPBC - ( default=off ) ignore the periodic boundary conditions 
                          when calculating distances 
              REFERENCE - the reference values for each of the torsional angles. If 
                          you use a single REFERENCE value the same reference value is 
                          used for all torsions. You can use multiple instances of this 
                          keyword i.e. REFERENCE1, REFERENCE2, REFERENCE3... 
            COEFFICIENT - the coefficient for each of the torsional angles. If you 
                          use a single COEFFICIENT value the same reference value is used 
                          for all torsional angles. You can use multiple instances of 
                          this keyword i.e. COEFFICIENT1, COEFFICIENT2, COEFFICIENT3... 


