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[/cpp]
#include "iostream"
#include "string"

using namespace std;


bool A (char n)
{
if( n == '1' || n == '4')
return 0;
else
return 1;
}

bool B (char n)
{
if( n == '5' || n == '6')
return 0;
else
return 1;
}

bool C (char n)
{
if( n == '1' || n == '7' || n == '0')
return 0;
else ...