t1: TORSION ATOMS=5,7,9,15 
t2: TORSION ATOMS=7,9,15,17
d1: DISTANCE ATOMS=7,17 COMPONENTS 
d1ox: TORSION ATOMS=7,9,15,17
PRINT ARG=(d1\.[xy]) STRIDE=100 FILE=colvar FMT=%8.4f
PRINT ARG=(d1\.[xy]),(t[0-9]) STRIDE=100 FILE=colvar1 FMT=%8.4f
PRINT ARG=(d1\.[xy]|t[0-9]) STRIDE=100 FILE=colvar2 FMT=%8.4f
PRINT ARG=(d1\.[xy]),(d1.[xy]) STRIDE=100 FILE=colvar3 FMT=%8.4f
PRINT ARG=(d1.[xy]) STRIDE=100 FILE=colvar4 FMT=%8.4f
