Write some advice to people using should and the word in brackets ​

i think that the ideal political system is a presidential republic. a president is the head of a country. a president deals with international problems and national matters. he is elected by secret ballot. general elections are held every four years. all citizens, aged 18 have the right to vote. there are few political parties in a country. each political party puts up one candidate for each constituency. the judicial branch of the government is headed by the supreme. a country must be divided into several regions. in every region there must be the head or a governor. he is elected by people every four years. the ideal political system is a system which helps to rule over a country correctly. a happy country is a country where happy people live. our politicians must think of people and how to make their life better.