ptval = {}

ptval['H_'] = '001'
ptval['He'] = '002'
ptval['Li'] = '003'
ptval['Be'] = '004'
ptval['B_'] = '005'
ptval['C_'] = '006'
ptval['N_'] = '007'
ptval['O_'] = '008'
ptval['F_'] = '009'
ptval['Ne'] = '010'
ptval['Na'] = '010'
ptval['Mg'] = '011'
ptval['Al'] = '012'
ptval['Si'] = '013'
ptval['P_'] = '014'
ptval['S_'] = '015'
ptval['Cl'] = '016'
ptval['Ar'] = '017'
ptval['K_'] = '018'
ptval['Ca'] = '019'

fileHandle = open ('input.txt', 'r')
for x in fileHandle:
	if x.strip() in ptval:
		print ptval[x.strip()]