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Figure 1.

Klaus-P eter Simon [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]

Figure 2.

Zhengan [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]

Figure 3.

Cobija [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)]

Figure 4.

Teomancimit [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]