Common typos: fuv1977duv1977dfv1977dfu1977dfuv977dfuv177dfuv197sfuv1977ffuv1977efuv1977xfuv1977cfuv1977rfuv1977dduv1977dguv1977druv1977dcuv1977dvuv1977dtuv1977dfiv1977dfyv1977dfjv1977df7v1977df8v1977dfhv1977dfuc1977dfub1977dfuf1977dfug1977dfuv2977dfuvq977dfuvw977dfuv1077dfuv1877dfuv1o77dfuv1i77dfuv1987dfuv1967dfuv19u7dfuv19y7dfuv1978dfuv1976dfuv197udfuv197yfduv1977dufv1977dfvu1977dfu1v977dfuv9177dfuv1797sdfuv1977dsfuv1977fdfuv1977dffuv1977edfuv1977defuv1977xdfuv1977dxfuv1977cdfuv1977dcfuv1977rdfuv1977drfuv1977ddfuv1977dfduv1977dgfuv1977dfguv1977dfruv1977dfcuv1977dvfuv1977dfvuv1977dtfuv1977dftuv1977dfiuv1977dfuiv1977dfyuv1977dfuyv1977dfjuv1977dfujv1977df7uv1977dfu7v1977df8uv1977dfu8v1977dfhuv1977dfuhv1977dfucv1977dfuvc1977dfubv1977dfuvb1977dfufv1977dfuvf1977dfugv1977dfuvg1977dfuv21977dfuv12977dfuvq1977dfuv1q977dfuvw1977dfuv1w977dfuv10977dfuv19077dfuv18977dfuv19877dfuv1o977dfuv19o77dfuv1i977dfuv19i77dfuv19787dfuv19677dfuv19767dfuv19u77dfuv197u7dfuv19y77dfuv197y7dfuv19778dfuv19776dfuv1977udfuv1977ydfuuv1977dfuvv1977dfuv11977dfuv19977dfuv19777