The power, a real number such as 1.0, is prompted for by the programs. S is the Subreplication option. It informs the program that after each distance will be provided an integer indicating that the distance is a mean of that many replicates. There is no auxiliary information, but the presence of the S option indicates that the data will be in a different form. When the number of replicates is zero, a distance value must still be provided, although its vale will not afect the result.
G is the usual Global branch-swapping option.
M is the usal Multiple data sets option, available in all of these programs. The numerical options are the usual ones and should be clear from the menu. Note that when the options L or R are used one of the species, the first or last one, will have its name on an otherwise empty line. Even so, the name should be padded out to full length with blanks. Here is a sample lower- triangular data set.