std::string::size_type begin = 0, end;
while (begin != keybegin) {
end = str.find_first_of('-', begin);
std::string mod(str, begin, end-begin);
std::string::size_type begin = 0, end;
while (begin != keybegin) {
end = str.find_first_of('-', begin);
std::string mod(str, begin, end-begin);