#### SYSTEM-70

Proposed by Daniel Sitaru-Romania SYSTEM-70 Solution by George Florin Serban-Romania

#### SYSTEM-69

Proposed by Daniel Sitaru-Romania SYSTEM-69 Solution by George Florin Serban-Romania

#### SYSTEM-68

Proposed by Daniel Sitaru-Romania SYSTEM-68 Solution 1 by Abdul Aziz-Semarang-Indonezia, Solution 2 by Florica Anastase-Romania

#### SYSTEM-67

Proposed by Daniel Sitaru-Romania SYSTEM-67 Solution by Santos Martins Junior-Brusels-Belgium

#### SYSTEM-66

Proposed by Mokhtar Khassani-Mostaganem-Algerie SYSTEM-66 Solution by Santos Martins Junior-Brusels-Belgium

#### SYSTEM-65

Proposed by Daniel Sitaru-Romania SYSTEM-65 Solution 1 by Hussain Reza Zadah-Afghanistan, Solution 2 by Khaled Abd Imouti-Damascus-Syria

#### SYSTEM-64

Proposed by Daniel Sitaru-Romania SYSTEM-64 Solution by Michael Sterghiou-Greece

#### SYSTEM-63

Proposed by Mokhtar Khassani-Mostaganem-Algerie SYSTEM-63 Solution by Michael Sterghiou-Greece

#### SYSTEM-61

Proposed by Daniel Sitaru-Romania SYSTEM-61 Solution by Bedri Hajrizi-Mitrovica-Kosovo