# your code goes here
i=raw_input()
if i[1]>"9":print"2CH4 + 4O2 > 4H2O + 2CO2"
else:O=3*int(i[1:i.find('H')])+1;C=2*int(i[1:i.find('H')]);print"2"+i+" + "+str(O)+"O2"+" > "+i[i.find('H')+1:]+"H2O"+ " + "+str(C)+"CO2"
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCgppPXJhd19pbnB1dCgpCmlmIGlbMV0+IjkiOnByaW50IjJDSDQgKyA0TzIgPiA0SDJPICsgMkNPMiIKZWxzZTpPPTMqaW50KGlbMTppLmZpbmQoJ0gnKV0pKzE7Qz0yKmludChpWzE6aS5maW5kKCdIJyldKTtwcmludCIyIitpKyIgKyAiK3N0cihPKSsiTzIiKyIgPiAiK2lbaS5maW5kKCdIJykrMTpdKyJIMk8iKyAiICsgIitzdHIoQykrIkNPMiI=