A solid figure is given followed by a problem. Each surface of the solid figure (marked with 1, 2, 3, 4, 5, 6, etc.) corresponds to certain specific surface of the given problem. Your task will be to find out how it corresponds. Figure 1: 1 refers to the surface A B H E; 2 refers to the surface A B C D; 3 refers to the surface C D F G; 4 refers to the surface B C G H; 5 refers to the surface A D F E; 6 refers to the surface E F G H. If surfaces B and D in figure 1 correspond to surfaces 1 and 3 respectively in key figure 2, then the points marked as 5 in figure 1 correspond to which point in the key figure 2 ?
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