"1H3He3Li2Be2B1C2N2O3F1Ne3Na1Mg3Al1Si3P1S3Cl4K1Ar0Ca5Sc3Ti3V1Cr3Mn1Fe3Co0Ni5Cu1Zn5Ga3Ge2As4Se1Br4Kr1Rb3Sr1Y2Zr2Nb3Mo2Tc3Ru2Rh3Pd2Ag4Cd3In4Sn3Sb5I1Te3Xe2Cs4Ba2La1Ce1Pr3Nd1Pm5Sm2Eu5Gd2Tb4Dy2Ho2Er2Tm4Yb2Lu3Hf3Ta3W2Re4Os2Ir3Pt2Au4Hg3Tl3Pb2Bi0Po1At12Rn1Fr3Ra1Ac4Pa1Th5Np1U5Am1Pu3Cm0Bk4Cf1Es5Fm0"=~/#{gets}\d/
p eval($`.gsub /\D/,?+)