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Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /var/www/tb-usercake/models/config.php on line 51
static S xyzIndexToVar(int i) { assertTrue(i > 0); if (i == 1) ret "X"; if (i == 2) ret "Y"; if (i == 3) ret "Z"; i -= 3; if (i <= 26) ret "A" + (char) ('A' + i-1); fail("var too high"); }