CF858E.Tests Renumeration

The first line contains single integer $n$ ( $1<=n<=10^{5}$ ) — the number of files with tests.

$n$ lines follow, each describing a file with test. Each line has a form of "name_i type_i", where "name_i" is the filename, and "type_i" equals "1", if the $i$ -th file contains an example test, and "0" if it contains a regular test. Filenames of each file are strings of digits and small English letters with length from $1$ to $6$ characters. The filenames are guaranteed to be distinct.

In the first line print the minimum number of lines in Vladimir's script file.

After that print the script file, each line should be "move file_1 file_2", where "file_1" is an existing at the moment of this line being run filename, and "file_2" — is a string of digits and small English letters with length from $1$ to $6$ .

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