!>
!> SLAMRG will create a permutation list which will merge the elements
!> of A (which is composed of two independently sorted sets) into a
!> single set which is sorted in ascending order.
!> 

N1

!>          N1 is INTEGER
!> 

N2

!>          N2 is INTEGER
!>         These arguments contain the respective lengths of the two
!>         sorted lists to be merged.
!> 

A

!>          A is REAL array, dimension (N1+N2)
!>         The first N1 elements of A contain a list of numbers which
!>         are sorted in either ascending or descending order.  Likewise
!>         for the final N2 elements.
!> 

STRD1

!>          STRD1 is INTEGER
!> 

STRD2

!>          STRD2 is INTEGER
!>         These are the strides to be taken through the array A.
!>         Allowable strides are 1 and -1.  They indicate whether a
!>         subset of A is sorted in ascending (STRDx = 1) or descending
!>         (STRDx = -1) order.
!> 

INDEX

!>          INDEX is INTEGER array, dimension (N1+N2)
!>         On exit this array will contain a permutation such that
!>         if B( I ) = A( INDEX( I ) ) for I=1,N1+N2, then B will be
!>         sorted in ascending order.
!> 

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