% sstipics.t28 -- generated from sstipics.mp
\fmfL(18.2709,16.25737,rb){$-k_{12} \swarrow $}%
\fmfL(22.04318,5.62872,lb){$\nwarrow k_1$}%
\fmfL(12.59846,7.89122,t){$k_2 \rightarrow $}%
