This is MetaPost, Version 0.993 (Web2C 7.5.6) (mem=mpost 2008.5.8)  8 MAY 2008 03:13
**chash2.mp
(chash2.mp (chord.mp (/usr/share/texmf-texlive/metapost/base/boxes.mp)) [1] )
1 output file written: chash2.1