function iLevel(seta, setb) {
	var b = new Array();
	var c = new Array();
	b = stringToNumArray(setb);
	//C is inverted b, compare c with a using tLevel.
	for (var i = 0; i < b.length; i++) {
		if ( (12 - b[b.length - 1 - i]) == 12 )
			c[i] = 0;		else
			c[i] = 12 - b[b.length - 1 - i];
	}
	return tLevel(seta, numArrayToString(c));
}


function inversion() {
	for (var i = 0; i < master.length; i++) {
		for (var j = 0; j < master.length; j++) {
			master[i][REAL_INV][master[i][REAL_INV].length] =
				fixInt(iLevel(master[i][MINSPAN], master[j][MINSPAN]));
		}
	}
} 