foo.cc: In function 'int main()':
foo.cc:27:18: warning: variable 'poistion' set but not used [-Wunused-but-set-variable]
     int num = 0, poistion = 0;
                  ^~~~~~~~
foo.cc:35:52: warning: array subscript is above array bounds [-Warray-bounds]
         if (j == lenw && (i + j == lens || s2[i + j] == ' '))
                                            ~~~~~~~~^

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