0_0_3884122_11202.cpp: In function `M paw(M&, int)':
0_0_3884122_11202.cpp:26: error: invalid initialization of non-const reference of type 'M&' from a temporary of type 'M'
0_0_3884122_11202.cpp:11: error: in passing argument 1 of `M multiply(M&, M&)'
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