α΅Κ°β±Λ’ Λ’β±α΅α΅ β±Λ’ α΅α΅α΅α΅ α΅α΅ α΅α΅ α΅β±α΅Κ·α΅α΅ α΅βΏ α΅ πΉβ―πππβ΄π
βeβmβmβaβ β+β
βaβlβiβcβiβaβ
β
ππ½πΆππ πβ‘π