% sstipics.t27 -- generated from sstipics.mp
\fmfL(22.04318,14.37128,lt){$\swarrow -k_{12}$}%
\fmfL(12.59848,12.10875,b){$\rightarrow k_{12}$}%
\fmfL(2.88898,5.49306,rb){$k_1 \nearrow $}%
