tio could be read for no but ratio is impossible.
Perhaps no letter lost between b and r; F]ebruar[i- is therefore possible but is not an easy reading. Line 4: coris (cf. 154.7 and note) is not impossible but is not probable.
The as symbol also occurs in c.3; here it appears to be followed by a symbol unlike any other we have seen in the tablets (but there is no certainty that all the traces on the photograph are ink).