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Pedro I of Brazil was Emperor of Brazil from 1822 to 1831.
Suppose Pedro I does not become King Pedro (Peter) IV of Portugal.
Suppose he is Emperor of Brazil until 1834.
Suppose his daughter Maria does not become Queen Maria II of Portugal. Suppose instead she becomes Empress Maria I of Brazil.
Suppose Pedro II does not become Emperor Pedro II. Suppose instead he goes to Portugal, where he reigns as King Pedro (Peter) IV.
What happens then?