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start learning

Question		Answer
hedeik start learning		600
archaik start learning		1500
proterozoik start learning		1959
kambr start learning		56
ordowik-sylur start learning		66
dewon start learning		60
karbon start learning		67
perm start learning		40
trias start learning		51
jura start learning		56
kreda start learning		79
paleogen-neogen start learning		63,42
czwarorzęd start learning		2,58
prekambr start learning		4059
paleozoik start learning		289
mezozoik start learning		135
kenozoik start learning		66

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