Список всех повторок, рассматриваю обмен:
MEX 1, 3, 4, 6, 7, 14, 15, 18, 19, 20
RSA 4, 6, 8, 9, 10, 13, 18
KOR 1, 5, 6, 10, 15
CZE 1, 2, 4, 10, 12, 14, 15, 20
CAN 1, 2, 5, 6, 9, 11, 13, 14, 16, 17, 19
BIH 1, 6, 8, 11, 12, 16, 18, 19
QAT 1, 2, 3, 5, 6, 9, 10, 13, 15, 16, 17, 19
SUI 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13
BRA 1, 4, 5, 6, 7, 8, 9, 13, 20
MAR 1, 6, 7, 10, 11, 12, 13, 15, 16, 17
HAI 3, 4, 5, 11, 13, 14, 17, 18, 19, 20
SCO 1, 2, 4, 5, 7, 8, 12, 13, 14, 15, 17, 18, 20
USA 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 15, 18, 19
PAR 1, 2, 6, 8, 9, 11, 17, 18
AUS 3, 5, 6, 8, 9, 12, 13, 16
TUR 1, 2, 4, 5, 8, 14, 20
GER 3, 5, 6, 8, 9, 10, 12, 16, 17, 18
CUW 1, 2, 6, 7, 8, 9, 11, 13, 14, 15, 18, 20
CIV 4, 5, 8, 9, 12, 13, 14, 15, 18
ECU 5, 6, 7, 8, 9, 12, 13, 14, 17, 20
NED 2, 3, 5, 6, 8, 10, 11, 12, 13, 14, 16, 18
JPN 1, 5, 6, 7, 9, 12, 17, 19, 20
SWE 1, 2, 3, 8, 11, 12, 14, 15, 16, 20
TUN 6, 8, 11, 13, 14, 18, 19, 20
Bel 1, 4, 5, 6, 9, 10, 12, 13, 14, 15, 19
EGY 2, 3, 5, 8, 10, 11, 12, 13, 14, 15, 18, 20
IRN 1, 2, 3, 5, 6, 7, 8, 9, 17, 18, 19
NZL 1, 2, 3, 4, 5, 12, 13, 15, 16, 18, 20
ESP 1, 3, 7, 8, 9, 11, 13, 14, 15
CPV 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 16, 17, 19
KSA 1, 2, 6, 7, 8, 14, 15, 19, 20
URU 1, 3, 5, 8, 9, 11, 13, 15, 17, 18, 19
FRA 3, 8, 9, 10, 16, 18, 20
SEN 2, 3, 9, 10, 11, 15, 16
IRQ 5, 8, 9, 12, 13, 14, 15, 18, 20
NOR 6, 7, 9, 10, 11, 12, 14, 15, 18, 19
ARG 3, 4, 5, 8, 10, 12, 17
ALG 1, 2, 8, 10, 13, 15, 16, 17, 20
AUT 1, 3, 4, 8, 10, 11, 12, 13, 15
JOR 1, 7, 8, 14, 15, 16, 17, 19
POR 4, 5, 11, 13
COD 3, 5, 8, 11, 14, 16, 20
UZB 5, 6, 9, 10, 11, 15, 20
COL 2, 6, 8, 10, 11, 15, 18, 19
ENG 1, 2, 3, 5, 8, 9, 10, 12, 15, 19, 20
CRO 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 16, 18, 19
GHA 6, 9, 10, 11, 13, 15, 16, 19
PAN 1, 2, 3, 6, 7, 11, 12, 13, 14, 15, 20
FWC 00, 1, 3, 4, 8, 10, 16

Нужны:
MEX 2, 10
RSA 17, 19, 20
CZE 3, 17, 18
CAN 4, 7, 18
BIH 3, 5, 7, 17
SUI 11, 17
BRA 12, 17
MAR 18, 20
HAI 6, 8, 10, 12
SCO 6, 11
USA 12, 14
PAR 5, 10, 13
AUS 2, 11, 14, 18
TUR 11, 18
GER 13, 19
CUW 4, 10, 12, 16, 19
CIV 2, 11, 19, 20
ECU 10, 15
NED 4, 9
JPN 3, 4, 5
SWE 5, 6, 10, 18
TUN 9, 12
Bel 3, 20
EGY 1, 19
IRN 4, 15, 16
NZL 14, 19
ESP 6, 10, 17
CPV 8
KSA 4, 10, 12, 13, 17, 18
URU 6
FRA 1, 14, 19
SEN 4, 5, 6
IRQ 3, 6, 10, 16, 17
NOR 8
ARG 16, 18
ALG 5, 7, 9, 11, 12, 14
AUT 6, 9
JOR 5, 10, 18
POR 6, 8, 16, 20
COD 1, 4, 18
UZB 1, 14, 18
COL 7
ENG 4, 11, 14, 17
CRO 2, 17
GHA 3, 7, 8, 17
PAN 10, 16, 18
FWC 9, 11, 12, 17