What does the code ‘so’ stand for in the given code language ?

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In a certain code language, ‘hope to see you’ is coded as ‘re so na di’, ‘please come to see the party’ is coded as ‘fi ge na di ke zo’, ‘hope to come’ is coded as ‘di so ge’ and ‘see you the party’ is coded as ‘re fi zo na’.

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In a medical college, there are 1600 students studying Dentistry and Homeopathy. Each student from each course knows one or more languages out of English, Hindi and Bangla. 45% of the students study Dentistry and remaining  students study Homeopathy.

Out of the students studying Dentistry boys and girls are in the ratio of 5:3 respectively.

Out of the boys studying Dentistry, 16% know only English, 10%know only Hindi and 4% know only Bangla. 24% know English as well as Hindi, 20% English as well as Bangla, 14% know Hindi as well as Bangla. Remaining boys know all three languages.

Out of the girls studying Dentistry, 20% know only English, 10% know only Hindi and 10% know only Bangla. 20% know English as well as Hindi, 20% know English as well as Bangla, 10% know Hindi as well as Bangla. Remaining girls know all three languages.

Out of the students studying Homeopathy boys and girls are in the ratio of 4:7 respectively.

Out of the boys studying Homeopathy, 20% know only English, 15% know only Hindi and 5% know only Bangla. 15% know English as well as Hindi,25% know English as well as Bangla, 10% know Hindi as well as Bangla. Remaining boys know all three languages.

Out of the girls studying Homeopathy, 15% know only English, 15% know only Hindi and 5%know only Bangla. 20% know English as well as Hindi, 20% know English as well as Bangla, 15% know Hindi as well as Bangla. Remaining girls know all three languages.

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