% sstipics.t21 -- generated from sstipics.mp
\fmfL(22.3724,3.61368,rt){$k_1 \nwarrow $}%
\fmfL(25.98894,14.21642,lt){$\swarrow -k_{12}$}%
\fmfL(14.99998,12.10876,b){$k_2 \rightarrow $}%
\fmfL(4.28102,13.76645,rt){$k_2 \searrow $}%
