Test cases: (for 43.php, correct=manual correction)
2351-0l2e
0351-1l1e
2301-1l2e
2031-0l3e
2034-1l2e
2431-1l2e
2341-0l3e
2340-1l2e
2331-0l2e
2441-1l3e[correct:0l3e]
3441-1l2e[correct:0l2e]
2231-1l2e[correct:0l2e]
2321-1l2e[correct:0l2e]
2401-2l2e
2041-0l4e