B's: 
Burundi
Burundi pick 33b: 10 Francs from 1986
1.12.1986; 1.5.1988; 1.10.1989; 1.10.1991. Blue-green on tan underprint. Map of Burundi with arms superimposed at center. Text on back.
Collectors Comment: P-33b.2 TBB B214d
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Burundi pick 44b: 100 Francs from 2011
9.11.2011. Purple on multicolored underprint. Prince Ragawasore at right. Back: home construction.
Collectors Comment: Purchased from banknoteworld.com. Prefix: MC - QQ. TBB B231b
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Burundi pick 45c: 500 Francs from 2013
31.10.2013. Dark blue and multicolored. Bas relief of natives, trees, and cauldron. Back: central bank of Burundi building at center.
Collectors Comment: Purchased from banknoteworld.com. Prefix: BS - BW. TBB B232c
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Burundi pick 50a: 500 Francs from 2015
15.1.2015. Orange. Coffee plant at right. Back: map of Burundi, boat.
Collectors Comment: Purchased from Banknoteworld.com. Prefix: AA - AB. TBB B236a
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Burundi pick 52b: 2000 Francs from 2018
04.07.2018. Pink. Pineapple at right. Back: map of Burundi, farmer.
Collectors Comment: Purchased from Yuri111. Prefix: CC - CG. TBB B238b