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I put all two-color permutations of the Red/Blue/Yellow/White Nordic Cross together on a single flag : r/vexillology
![Flag of autonomous region of Portugal - Madeira: yellow and blue vertical stripes with red bordered white cross on central band Stock Photo - Alamy Flag of autonomous region of Portugal - Madeira: yellow and blue vertical stripes with red bordered white cross on central band Stock Photo - Alamy](https://c8.alamy.com/comp/JB29HY/flag-of-autonomous-region-of-portugal-madeira-yellow-and-blue-vertical-JB29HY.jpg)
Flag of autonomous region of Portugal - Madeira: yellow and blue vertical stripes with red bordered white cross on central band Stock Photo - Alamy
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