bool(true)
string(1) "C"
bool(true)
string(1) "D"
**************
bool(true)
string(1) "C"
bool(true)
string(1) "D"
**************
bool(false)
string(1) "C"
bool(false)
string(1) "D"
**************
bool(false)
string(1) "C"
bool(false)
string(1) "D"
**************
bool(true)
string(1) "D"
bool(true)
string(1) "D"
bool(false)
string(1) "D"
bool(false)
string(1) "C"