ALPHA, BETA, gamma, delta. The organization has also categorized six strains as variants of interest. The next letters on the list, if it comes to it, which it probably will, are epsilon, zeta, eta and theta. They will now be given the letters Alpha, Beta, Gamma, and Delta respectively, to reflect their order of detection, with any new variants following the pattern down the Greek alphabet. The organisation said the labels do not replace existing scientific names involving numbers, Roman letters and full stops, which convey important scientific information and will continue to be used in research.
ALPHA, BTA, par, and doctors.
( z0 and :op ( z1 organization :name ( z2 name :op "earthquake" ) ) :op ( z3 organization :name ( z4 name :op "BTA" ) ) :op ( z5 par ) :op ( z6 doctor ) )
(z0 / and
    :op1 (z1 / organization
             :name (z2 / name
                       :op1 "earthquake"))
    :op2 (z3 / organization
             :name (z4 / name
                       :op1 "BTA"))
    :op3 (z5 / par)
    :op4 (z6 / doctor))
ALPHA , BTA , par , and doctors .
z2 :op1 1
z1 :name z2
z3 :name z4
z4 :op1 0
z0 :op3 z5
z0 :op2 z3
z0 :op1 z1
z0 :op4 z6