#include <iostream>
#include <string>
int main() {
std::string lines[3];
lines[0] = "abcdefg";
lines[1] = "hijklmn";
lines[2] = "opqrstu";
int length = sizeof(lines) / sizeof(lines[0]);
for (int i=0; i < length; i++) {
for (int j=0; j < lines[i].length(); j++) {
std::cout << lines[i][j] << "\n";
}
}
return 0;
}
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