  Long strings emerge in many Quantum Field Theories, for example as vortices
in Abelian Higgs theories, or flux tubes in Yang-Mills theories. The actions of
such objects can be expanded in the number of derivatives, around a long
straight string solution. This corresponds to the expansion of energy levels in
powers of 1/L, with L the length of the string. Doing so reveals that the first
few terms in the expansions are universal, and only from a certain term do they
become dependent on the originating field theory. Such classifications have
been made before for bosonic strings. In this work we expand upon that and
classify also strings with fermionic degrees of freedom, where the string
breaks D=4 N=1 SUSY completely. An example is the confining string in N=1 SYM
theory. We find a general method for generating supersymmetric action terms
from their bosonic counterparts, as well as new fermionic terms which do not
exist in the non-supersymmetric case. These terms lead to energy corrections at
a lower order in 1/L than in the bosonic case.
