S1U1B3B3I1T1U1M3I1N1O1U1S1
19 points
SUBBITUMINOUS is validvalid
of, relating to, or being coal of lower rank than bituminous coal but higher than lignite
of, relating to, or being coal of lower rank than bituminous coal but higher than lignite
of, relating to, or being coal of lower rank than bituminous coal but higher than lignite
of, relating to, or being coal of lower rank than bituminous coal but higher than lignite