back [Verb] + tough [Adjective]

Strength Strength Dispersion
A:
4
CHISQ:
1.48
AWT:
18,209,755
TTEST:
0.9
G2:
2.62
FAWT:
2.99
MI:
0.86
LOGLOG:
1.73
JD:
0.51
MI3:
4.86
DICE:
0.11
RANGE: