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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 commonPrefixMulti(L l) { if (empty(l)) ret ""; S s = l.get(0); for (int i = 1; i < l(l); i++) { s = commonPrefix(s, l.get(i)); if (empty(s)) break; } ret s; }