Your job is to find out the secret number hidden in a matrix, each of whose element is a digit ('0'-'9') or a letter ('A'-'Z'). You can see an example matrix in Figure 1.
For each data set, print the hidden number on a line. Leading zeros should be suppressed.
7 4 9R2A993 0E314A0 8A900DE 820R037 6 7 JH03HE ID7722 0DA1AH 30C9G5 99971A CA7EAI AHLBEM 20 2 A1234567891234CBDEGH BDEDF908034265091499 0 0
23900037 771971 12345908034265091499
题号:1381,1382,1383,1384,1385,1386,1387,1388,1389,1390
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