Grade change missions

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1 H grade mission 2 G grade mission 3 F grade mission 4 E grade mission 5 D grade mission 6 C grade mission 7 B grade mission 8 A grade mission

You need to complete H grade change mission to advance to H grade.

You need to complete G grade change mission to advance to G grade.

You need to complete F grade change mission to advance to F grade.

You need to complete E grade change mission to advance to E grade.

You need to complete D grade change mission to advance to D grade.

You need to complete C grade change mission to advance to C grade.

You need to complete B grade change mission to advance to B grade.

You need to complete A grade change mission to advance to A grade.