Penal Code 47 (b) But if, while A is beating Z, Y interferes, and A intentionally strikes Y, here, as the blow given to Y is no part of the act whereby A voluntarily causes hurt to Z, A is liable to one punishment for voluntarily causing hurt to Z, and to another for the blow given to Y. Punishment of a person found guilty of one of several offences, the judgment stating that it is doubtful of which 72. In all cases in which judgment is given that a person is guilty of one of several offences specified in the judgment, but that it is doubtful of which of these offences he is guilty, the offender shall be punished for the offence for which the lowest punishment is provided, if the same punishment is not provided for all. 73–74. (Deleted by F.M. Ord. 14 of 1953). Punishment of persons convicted, after a previous conviction of an offence punishable with three years imprisonment 75. Whoever, having been convicted of an offence punishable under Chapter XII or Chapter XVII with imprisonment for a term of three years or upwards, or having been convicted in any other part of Malaysia, in the Republic of Singapore or in the State of Brunei of an offence of a nature similar to any of those offences, shall be guilty of any offence punishable under either of those Chapters with imprisonment for a term of three years or upwards, and shall be subject for every such subsequent offence to double the amount of punishment to which he would otherwise have been liable for the same. Punishment of mandatory imprisonment for persons convicted of multiple serious offences 75a. Whoever, having been convicted at least two times of a serious offence and was punished with at least two years of imprisonment for each of those convictions, shall be punished with mandatory imprisonment for the third and subsequent offences and the term of imprisonment shall not be less than double the term of the longer term of imprisonment imposed for the previous convictions.